Article 63
1. Establishment of an amount receivable is the act by which the authorising officer by delegation or sub-delegation: (a) verifies that the debt exists; (b) determines or verifies the reality and the amount of the debt; (c) verifies the conditions in which the debt is due. 2. The EDF resources made available to the Commission and any amount receivable that is identified as being certain, of a fixed amount and due shall be established by a recovery order to the accounting officer followed by a debit note sent to the debtor, both drawn up by the authorising officer responsible. 3. Amounts wrongly paid shall be recovered. 4. Article 86 of Regulation (EC, Euratom) No 2342/2002 shall apply mutatis mutandis as regards the conditions in which interest on late payment is due to the EDF.