RM3233 | Manually issued payable order: Repayments set-off against IT arrears
From HM Revenue & Customs · Repayment Claims Manual
If a repayment is to be set-off against arrears of Income Tax etc, the payable order and duplicate are to be stamped `FOR CREDIT ONLY: NOT TO BE BANKED ‘. Do not stamp
payable orders sent to local collectors
payable orders sent to the Accounts Offices for set-off against an employer’s PAYE liability.
These payable orders are to be banked and should not, therefore, be endorsed.