There is no edit and no delete
You reverse the payment, then issue the correct one.
What reversing does
- The original stays exactly as it was, marked Reversed.
- A second entry undoes it — same accounts, opposite sides, same amount.
- The person's outstanding balance goes back to where it was before.
- Both entries stay visible for ever, with who did each and when.
The requisition then has that money available to issue again, so you can pay the right amount.
Why there is no edit button
A payment records that money left the school's bank. If it could be rewritten in place, a figure that read 10,000 last week and reads 1,000 today would carry no trace of which was ever true, or who changed it, or when. Every ledger that has to stand up to an audit works this way, and it is the same rule the New Ledger applies to journals.
Reversing is not a mistake being hidden. It is a mistake being shown, corrected and dated.
If the cheque never left the office
Reverse it anyway. The record should say a cheque was written and then cancelled, because that is what happened — and your bank reconciliation later still has to account for the cheque number.
Permission
Reversing needs Requisitions — Issue Payment. Undoing a disbursement is the same authority as making one, so it is deliberately the same permission.