Guide to the bank guarantee (aval, a surety regulated in Civil Code arts. 1822 ff.) and autonomous first-demand guarantees: key differences, enforcement by the beneficiary, external and internal defences, Supreme Court case law and the manifest abuse exception.
Spain's Civil Code (Arts. 1822–1856) governs fianza (suretyship), an accessory, subsidiary guarantee where the surety can raise all defences of the principal debtor. Bank avales are typically solidary (subsidiary benefit waived) under Art. 1831.2 CC.
Garantías autónomas a primer requerimiento (governed by URDG 758 or UCP 600 if chosen) are independent of the underlying obligation: the bank pays on documentary compliance alone, regardless of whether the underlying breach exists.
The only exception: manifest abuse (STS 1ª 345/2024), the beneficiary must have no material right to the guarantee and must know it. Courts grant no-pay injunctions only with clear documentary evidence of fraud; a mere contractual dispute is insufficient.
Lexiel finds Supreme Court decisions on guarantee enforcement and manifest abuse, identifies whether the legal basis is fianza or autonomous guarantee, and drafts opposition arguments with verified citations.
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