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I left it as it was and told the client to ask for clarification from the company that sent him the letter. Betty, Eftihia, ljarque and Costa thank you all for your suggestions! 2 KudoZ points were awarded for this answer
If this is a typo, it's a terrible one!
In case it helps, here is the rest of the sentence: ..."payment file will be returned to the MINISTERIO DE ECONOMIA Y HACIENDA as unclaimed and the payment is not deductable from your prize award."