Check the guarantee itself: beneficiary, amount, expiry, conditions for a demand, amendments and any incorporated rules. A conditional guarantee must be distinguished from an unconditional undertaking. A dispute over defective work or an unpaid invoice does not alone establish that a demand is invalid.
Article 417 limits a bank’s ability to refuse payment because of disputes in the underlying relationships. Its court-attachment exception is not activated by a complaint or a customer instruction. The evidence and urgency must support the particular judicial relief sought.
Assess the position before payment and before the guarantee expires. Once payment has been made, recovery involves a different claim and evidence. Any application should accurately disclose the contract, demand and relevant correspondence; urgent relief is not a guaranteed outcome.
A practical next step
Obtain the complete guarantee, demand, amendments, contract and proof of the alleged defect, and seek an urgent assessment of the applicable court procedure.
Official sources
Commercial Transactions Law: letters of guarantee