Identification of the payment
Article 17
1. Every payment must indicate in the reference field the invoice number, with the exception of payments due under Article 10. Payments due under Article 10 shall indicate in the reference field the identity of the appellant(s) and, if available, the number of the decision that is being appealed. 2. If the purpose of the payment cannot be established, the Agency shall set a deadline by which the payer must notify it in writing of the purpose of the payment. If the Agency does not receive a notification of the purpose of the payment before expiry of that deadline, the payment shall be considered invalid and the amount concerned shall be refunded to the payer.