An instruction from the payee to the bank to arrange for the transfer of funds from the payer's account to his account. In order for such an instruction to actually result in the debiting of money from the client's (payer's) account, it is necessary, among other things, that the client (payer) has expressly authorised his bank to make payments by direct debit in favour of the beneficiary's account specified in the authorisation (given his consent to the debit). Other terms used: payment order for direct debit; direct debit order; direct debit;