Currency of Payment Issues in Spanish Enforcement

Currency of payment becomes particularly important when an arbitral award or foreign judgment requires payment in a currency other than the euro—for example, USD, GBP, CHF, JPY or AED—and enforcement is sought in Spain. Spanish law generally does not require a foreign-currency monetary award to be converted into euros merely because enforcement takes place in Spain. The principal procedural rule is Article 577 of the Spanish Civil Procedure Act (Ley de Enjuiciamiento Civil—LEC).

The key distinction is between:

1. the currency in which the award establishes the principal debt;
2. the currency used to calculate assets for attachment;
3. the currency in which procedural interest, costs and expenses are payable; and
4. the exchange rate applicable if conversion becomes necessary.

Article 577 LEC expressly contemplates enforcement of a title denominated in foreign currency. Spanish case law has also emphasized that foreign-currency obligations can remain foreign-currency obligations during enforcement rather than automatically becoming euro obligations.

1. Statutory Framework

Article 577 LEC — foreign-currency debts

Article 577 LEC is the central provision.

Where the enforceable title fixes a monetary amount in a foreign currency, execution is opened for the purpose of obtaining that foreign currency.

However, the statute makes an important distinction:

• principal debt: generally pursued in the currency specified by the title;
• costs and expenses of enforcement: paid in the national currency;
• procedural default interest: also paid in the national currency.

For attachment purposes, Article 577(2) requires the foreign amount to be converted into a domestic monetary equivalent so that the court can determine the amount of assets that need to be seized. Where the currency has an official quotation, the relevant official exchange rate is used; where it lacks an official quotation, the court determines an appropriate rate based on the evidence presented.

This produces an important conceptual distinction:

Conversion for purposes of calculating the value of an attachment is not necessarily conversion of the underlying debt into euros.

That distinction is fundamental in enforcement of foreign arbitral awards.

2. Recognition and Enforcement of a Foreign Arbitral Award

For an award rendered outside Spain, the process normally has two stages.

Stage 1 — Exequatur

The creditor first seeks recognition of the foreign award in Spain.

The relevant framework includes:

• Spanish Arbitration Act;
• New York Convention 1958;
• applicable bilateral or multilateral treaties.

The Spanish court does not ordinarily reconsider the merits of the dispute at the recognition stage.

Stage 2 — Enforcement

Once recognized, the foreign award is enforced through the Spanish enforcement machinery applicable to enforceable domestic titles. Article 46.2 of the Arbitration Act connects recognition of foreign awards with domestic enforcement procedures.

Therefore, once a foreign award denominated in USD, GBP or another currency is recognized, the currency question becomes principally an execution-law question, especially under Article 577 LEC.

3. The Basic Rule: The Award Currency Should Normally Be Respected

Suppose an ICC tribunal seated in Paris orders:

Respondent shall pay USD 10 million.

The creditor seeks enforcement in Madrid.

The fact that Spain's domestic currency is the euro does not by itself transform the award into a EUR 10 million award.

The starting position is:

USD 10 million remains the enforceable principal obligation.

This approach is particularly important because currency fluctuations may be substantial between:

• date of breach;
• date of arbitration;
• date of award;
• date of exequatur;
• date of enforcement;
• date of actual payment.

Automatically fixing the award at the exchange rate prevailing on one of those dates could materially alter the economic substance of the award.

4. Currency of the Principal Debt vs. Currency of Enforcement Expenses

Spanish law deliberately separates these matters.

Principal

If the award says:

USD 5,000,000

the execution is ordinarily directed toward obtaining those dollars.

Costs and procedural interest

The costs and procedural interest associated with Spanish enforcement are treated differently and are payable in euros.

This separation is expressly recognized in Spanish jurisprudence concerning foreign-currency execution. A Spanish first-instance decision explained that Article 577 requires execution of the foreign-currency debt in the currency specified by the title while costs, expenses and procedural default interest are payable in domestic currency.

Thus:

5. Exchange Rate for Attachment

This is one of the most important practical issues.

Suppose an award orders:

USD 10 million

and the creditor seeks attachment of assets in Spain.

Spanish courts cannot simply say that the debtor's Spanish property is worth "USD 10 million." Spanish assets are normally valued in euros.

Therefore, Article 577(2) requires a conversion for the purpose of determining the amount to be secured by attachment.

For a currency with an official quotation, the statutory mechanism uses the official exchange rate applicable on the date enforcement is ordered.

This conversion does not necessarily extinguish the USD character of the underlying debt.

Example

Assume:

• Award: USD 10 million.
• Exchange rate when enforcement is ordered: EUR 1 = USD 1.10.

For attachment purposes:

USD 10 million ÷ 1.10 = approximately EUR 9.09 million.

The court can therefore calculate the amount of Spanish assets that should be attached.

But the creditor's substantive entitlement remains:

USD 10 million, rather than EUR 9.09 million.

If the exchange rate subsequently changes, that can become significant when actual payment occurs.

6. Foreign Currency Without an Official Quotation

Article 577(2) also addresses currencies for which there is no official quotation.

In that situation, the court may determine an appropriate exchange rate after considering the evidence submitted by the creditor.

This can involve:

• central-bank data;
• reliable financial-market quotations;
• expert evidence;
• contractual exchange mechanisms;
• evidence of the currency's convertibility;
• evidence concerning the relevant market.

The court may subsequently undertake the necessary liquidation under the provisions governing liquidation of monetary amounts.

This is particularly relevant where an award is denominated in a less frequently traded currency.

7. Can the Debtor Pay in Euros Instead?

This question requires more nuance.

Spanish civil-law doctrine concerning monetary obligations has historically considered whether a foreign-currency obligation can be discharged through payment of its euro equivalent.

The issue interacts with Article 1170 of the Spanish Civil Code.

A significant Spanish judicial discussion concluded that the foreign currency can be treated as a monetary "species," while also recognizing arguments supporting conversion into the domestic currency under appropriate circumstances. The jurisprudence and doctrine therefore distinguish between:

• the currency constituting the debt; and
• the mechanism by which that debt may ultimately be discharged.

The Spanish court decision in Auto JPI Fuenlabrada, 4 December 2014 provides an unusually detailed examination of this question and discusses the interaction of Articles 1170 CC and 577 LEC. It concluded that Article 577 should not necessarily be interpreted as excluding a debtor's ability to convert the foreign currency into domestic currency at the appropriate value, particularly where conversion does not prejudice the creditor.

But this should not be confused with an unrestricted right to substitute euros for the award currency.

A contractual provision or the award itself may make the currency obligation particularly strict.

8. Exchange-Rate Risk

Currency risk is one of the central problems.

Imagine:

• Award: USD 20 million.
• USD/EUR rate on award date: 1 USD = EUR 0.95.
• USD/EUR rate on payment date: 1 USD = EUR 0.82.

The euro equivalent has fallen substantially.

If the debtor simply pays the euro equivalent calculated on the award date, the creditor may receive materially less than the economic value of USD 20 million.

Conversely, if the euro strengthens, the debtor may argue that converting later produces a larger euro burden.

Spanish law therefore generally tries to preserve the currency denomination of the underlying obligation, rather than arbitrarily selecting a conversion date that changes the substance of the award.

9. Case Law

1. STS 30 October 1895

The Spanish Supreme Court's early jurisprudence recognized the relevance of Article 1170 CC to monetary obligations and the concept of monetary "species."

Its importance today is historical but significant: Spanish law has long distinguished between an obligation to deliver a specified monetary unit and an obligation simply expressed as a numerical amount.

The modern treatment of foreign-currency obligations developed from this conceptual foundation. The later Spanish jurisprudence discussed in the Fuenlabrada decision expressly refers to this authority.

Principle

A monetary obligation denominated in a particular currency can possess legal significance beyond a simple numerical valuation in euros.

2. STS 227/1954, 31 May 1954

This decision is important in the historical development of Spanish treatment of foreign-currency obligations.

It is cited in later Spanish judicial analysis concerning the difficulties created when a court must determine the domestic equivalent of an obligation expressed in another currency.

Principle

Currency conversion can create a substantive valuation issue rather than being merely an administrative calculation.

That is particularly important in arbitration because converting the award at the wrong date may effectively alter the amount awarded.

3. STS 589/1957, 3 October 1957

This case is associated with the historical breach-date approach to determining the domestic equivalent of a foreign-currency obligation.

The later Spanish judicial discussion identifies this case as supporting conversion by reference to the date when the monetary obligation became due.

Principle

Historically, Spanish law considered the date of breach or maturity as a significant point for determining the exchange value of a foreign-currency obligation.

However, the modern enforcement framework under Article 577 LEC has materially changed the practical analysis.

4. STS 492/1987, 16 July 1987

This is especially relevant because the later Spanish decision records that the Supreme Court accepted an alternative monetary condemnation expressed in one currency or another.

The case therefore demonstrates that Spanish law is not conceptually incapable of handling alternative currency mechanisms.

Principle

A judgment can, in appropriate circumstances, structure payment obligations in alternative currencies without the currency mechanism necessarily rendering the judgment internally contradictory.

For arbitration, this supports the proposition that tribunals should formulate currency provisions clearly if they intend to permit alternative payment.

5. STS 702/1991, 11 October 1991

This decision is relevant to the principle that the absence of a particular monetary denomination does not ordinarily make a monetary obligation impossible to perform.

The later Spanish judicial analysis cites it together with STS 238/2005 in connection with the principle:

genus nunquam perit — a generic obligation does not perish merely because a particular item is unavailable.

Principle

Temporary inability to obtain a particular currency does not automatically extinguish the underlying monetary obligation.

This can become important where a debtor argues that inability to source the award currency prevents enforcement.

6. STS 238/2005, 5 April 2005

This decision similarly supports the proposition that the non-availability of a particular monetary form does not automatically constitute impossibility of performance.

The later Spanish judicial treatment uses it in discussing foreign-currency obligations and the possibility of alternative monetary performance.

Principle

A debtor generally cannot transform a foreign-currency obligation into an unenforceable obligation merely by asserting difficulty in obtaining the relevant currency.

7. STS 26 November 1987

This authority is important for the treatment of procedural interest associated with monetary awards expressed in foreign currency.

Spanish legal scholarship discussing the decision explains that procedural interest arising from enforcement proceedings is conceptually independent from the underlying contractual obligation and is therefore treated differently from the foreign-currency principal.

Principle

The currency of the underlying monetary obligation and the currency applicable to procedural consequences of enforcement are not necessarily identical.

This distinction is now reflected in Article 577 LEC.

8. AP Málaga, Judgment 272/2023, 27 April 2023

This is a useful modern authority.

The Audiencia Provincial de Málaga dealt with an obligation expressed in pounds sterling and rejected the proposition that euros should automatically replace sterling.

The court specifically emphasized that where there was no restriction on acquiring pounds and the contractual obligation was denominated in pounds, payment in euros was not automatically acceptable. It also expressly referred to Article 577 LEC as demonstrating that Spanish procedural law permits enforcement in foreign currency.

Principle

Where the obligation is genuinely denominated in a foreign currency and there is no legal or practical impossibility of obtaining that currency, the euro should not automatically displace the agreed currency.

This is highly relevant by analogy to arbitral awards.

10. Arbitration-Specific Implications

For a foreign arbitral award, the most important question is:

What exactly did the tribunal order?

Suppose the tribunal states:

"The Respondent shall pay USD 15,000,000."

This is relatively straightforward.

But compare:

"The Respondent shall pay the euro equivalent of USD 15,000,000 calculated at the exchange rate prevailing on the date of payment."

This creates a different enforcement mechanism.

An even more complicated award might state:

"The Respondent shall pay USD 15,000,000 or its euro equivalent at the exchange rate prevailing on the date of the award."

The Spanish enforcement court should ordinarily seek to give effect to the award as rendered, rather than rewrite its currency mechanism.

This follows from the fundamental principle that exequatur is not an opportunity to reconsider the merits or modify the substantive disposition of the award. Spanish judicial practice confirms the restrictive nature of review at the recognition stage.

11. Currency Conversion Is Not a Merits Review

A debtor cannot ordinarily use a currency objection as a disguised attempt to reopen the award.

For example, if the tribunal determined:

USD 8 million + interest,

the Spanish court should not ordinarily reconsider whether the tribunal "should instead" have awarded euros.

The court's task is principally to determine:

1. whether the award is recognizable;
2. what amount the award actually requires;
3. what currency the award specifies;
4. how that award should be executed under Spanish procedural law.

This distinction is important because Spanish courts exercise considerable restraint concerning the substantive correctness of foreign arbitral awards.

12. Currency and Public Policy

Could an unusual currency mechanism violate Spanish public policy?

In principle, currency denomination alone is unlikely to constitute a public-policy objection.

For example, an award denominated in:

• USD;
• GBP;
• CHF;
• JPY;

does not become contrary to Spanish public policy simply because Spain uses the euro.

The public-policy exception under the New York Convention concerns much more fundamental defects.

Therefore, a debtor should not normally be able to resist recognition merely by saying:

"The award is denominated in dollars rather than euros."

The Spanish courts distinguish between a genuine Article V/public-policy objection and an ordinary enforcement mechanics question. The restrictive approach to public-policy review is illustrated by Spanish decisions concerning foreign arbitral awards.

13. Interest Creates a Separate Currency Problem

Interest must be divided into categories.

A. Contractual interest

If the tribunal awards:

USD 10 million plus 8% interest,

the contractual/award interest normally follows the currency and terms established by the award.

B. Arbitration-award interest

If the tribunal specifies a particular currency and rate, that determination should ordinarily be respected.

C. Spanish procedural interest

Once Spanish enforcement proceedings are underway, statutory procedural consequences can operate under Spanish law.

Article 577 expressly distinguishes procedural interest from the foreign-currency principal.

Therefore, a USD award does not necessarily mean that every subsequent monetary item must be calculated in USD.

14. Currency and Attachment of Spanish Assets

This is perhaps the most practically important distinction for an enforcement lawyer.

Assume:

• Award = USD 50 million.
• Debtor has a Spanish bank account containing EUR 30 million.
• Enforcement creditor seeks attachment.

The court must establish whether sufficient assets are being secured.

It therefore needs an euro valuation of the USD 50 million claim.

But that does not necessarily mean:

"The award has been converted permanently into euros."

Instead:

USD award → EUR valuation for enforcement/attachment purposes → attachment of Spanish assets → ultimate satisfaction of USD obligation or permitted euro equivalent.

The exchange-rate calculation therefore performs a procedural function.

15. What Happens When the Euro Equivalent Is Paid?

If conversion into euros is legally permissible, the central issue becomes the conversion date.

Potential dates include:

1. date of breach;
2. date of commencement of proceedings;
3. date of award;
4. date of recognition;
5. date of enforcement;
6. date of actual payment.

Spanish historical jurisprudence considered several of these possibilities. The modern procedural system, however, gives Article 577 a much more specific role in the execution phase.

The Fuenlabrada court's analysis is particularly useful because it explains that foreign-currency enforcement cannot be understood simply by selecting one historical conversion date; the distinction between the underlying obligation and enforcement mechanics must first be identified.

16. Practical Example

Assume an LCIA tribunal seated in London issues an award ordering:

Company A shall pay Company B USD 25 million.

Company B obtains recognition in Spain.

Step 1 — Exequatur

The Spanish court recognizes the award.

Step 2 — Enforcement application

Company B applies for enforcement of:

USD 25 million.

Step 3 — Attachment valuation

The Spanish enforcement court determines the euro equivalent for purposes of calculating the assets that must be attached.

Step 4 — Spanish assets

Company A owns:

• EUR bank deposits;
• Spanish real estate;
• shares in a Spanish company.

These assets can be attached under Spanish enforcement procedures.

Step 5 — Final satisfaction

The underlying principal remains a USD-denominated obligation unless the applicable legal or contractual mechanism permits payment by euro equivalent.

Step 6 — Costs and procedural interest

These may be treated separately in euros under Article 577 LEC.

17. What if the Award Itself Is Ambiguous?

Suppose the award says:

"Respondent shall pay 10 million."

But it does not say whether this means:

• EUR 10 million;
• USD 10 million;
• currency of the contract;
• currency of the claimant's loss.

That creates a substantially different problem.

The Spanish enforcement court should not normally use Article 577 to invent the currency of the award.

The question becomes one of interpreting the award itself.

Relevant materials may include:

• operative part of the award;
• reasoning;
• arbitration agreement;
• underlying contract;
• claims and submissions;
• currency in which damages were calculated;
• tribunal's treatment of interest.

The enforcement court's role is not to substitute its own merits determination for that of the tribunal.

18. Contractual Currency Clauses Matter

A well-drafted arbitration clause and underlying contract should identify:

"All monetary obligations shall be denominated and payable in USD."

Even better:

"Any award for monetary relief shall be expressed in USD, and the debtor shall satisfy the award in USD, except to the extent that mandatory law at the place of enforcement requires otherwise."

Such provisions reduce uncertainty.

A contract might also specify:

• reference exchange rate;
• source of exchange-rate data;
• conversion date;
• permitted payment currency;
• treatment of currency depreciation;
• treatment of banking charges;
• consequences of exchange controls.

19. Currency Risk Should Not Be Confused with Damages

A claimant may argue:

"The euro depreciated after breach, so I should receive additional damages."

That is not necessarily the same question as enforcing a foreign-currency award.

If the tribunal has already awarded:

USD 10 million,

the Spanish enforcement court normally cannot simply increase that amount because the EUR/USD rate changed.

The enforcement court's job is to enforce the award, not to provide a new currency-loss damages calculation.

20. Relationship with the New York Convention

For foreign awards, Article V of the New York Convention governs the principal grounds on which recognition and enforcement can be refused.

Currency denomination is generally not itself a refusal ground.

The more important Convention issues are:

• validity of the arbitration agreement;
• due process;
• excess of jurisdiction;
• composition of the tribunal;
• procedural irregularities;
• award not yet binding or set aside;
• non-arbitrability;
• public policy.

Once the award passes recognition, currency becomes primarily an execution problem governed by Spanish procedural law.

21. Important Distinction: Recognition vs. Conversion

This distinction can be summarized as follows:

Recognition question

"Is the foreign award legally entitled to recognition in Spain?"

Currency question

"How is the recognized monetary obligation to be executed in Spain?"

Attachment question

"What euro value should be assigned to the foreign-currency claim for purposes of seizing Spanish assets?"

Payment question

"In what currency may the debtor ultimately satisfy the obligation?"

These are four different legal questions.

Confusing them is one of the principal sources of errors in foreign-award enforcement.

22. Six Core Principles Emerging from the Case Law

The Spanish authorities support the following propositions:

1. Foreign-currency obligations are legally recognizable

Spanish law does not treat a foreign-currency obligation as invalid merely because the euro is Spain's currency.

2. The currency of the award matters

The enforcement court should ordinarily respect the currency specified in the enforceable title.

3. Article 577 LEC expressly permits foreign-currency execution

The principal debt can be pursued in the currency in which the title expresses it.

4. Conversion for attachment is not necessarily substantive conversion

A euro valuation may simply be required to determine how much Spanish property must be attached.

5. Costs and procedural interest are treated separately

Article 577 expressly distinguishes them from the foreign-currency principal.

6. Payment in euros is not automatically available

Modern Spanish appellate jurisprudence, including AP Málaga 272/2023, confirms that where the underlying obligation is in pounds and there is no impediment to obtaining that currency, euro payment should not automatically replace the agreed foreign currency.

23. Practical Checklist for Enforcement of a Foreign-Currency Award in Spain

Before seeking enforcement, the creditor should verify:

1. Currency of the award — Is it expressly stated?
2. Currency of the underlying contract — Does it corroborate the award?
3. Currency of interest — Is interest separately denominated?
4. Conversion mechanism — Does the award specify one?
5. Exchange-rate date — Does the award identify a date?
6. Currency of costs — These may be treated separately under Article 577.
7. Official quotation — Does the currency have an official exchange rate?
8. Attachment calculation — What euro equivalent should be used?
9. Payment mechanism — Can the debtor lawfully tender the foreign currency?
10. Exchange controls — Are there restrictions affecting actual payment?
11. Award interpretation — Is the operative part sufficiently clear?
12. Exequatur — Has the award first been recognized where required?

Conclusion

Spanish enforcement law takes a relatively sophisticated approach to currency.

The central rule is not "everything must be converted into euros." Rather, Spanish law distinguishes between the currency of the underlying monetary obligation and the domestic currency calculations necessary to operate the enforcement process.

For a foreign arbitral award, the practical rule is:

If the award validly orders payment in a foreign currency, Spanish enforcement should ordinarily respect that denomination; Article 577 LEC permits execution in the foreign currency, while requiring euro-based valuation where necessary for attachment and treating Spanish enforcement costs and procedural interest separately.

The case law—from the older Supreme Court authorities on foreign-currency obligations, through STS 492/1987, STS 702/1991, STS 238/2005, and particularly the detailed Auto JPI Fuenlabrada of 4 December 2014, to the modern AP Málaga 272/2023—shows a consistent movement toward preserving the economic identity of the foreign-currency obligation while giving Spanish courts the procedural tools necessary to enforce it.