Leaver paid after last day

An employee left on 31/03/23 so I processed the P45 with that as the leaver date but as we pay a week in hand they did did not receive their final pay until 07/04/23 after they had left. So now this doesn't reflect in the final figure in the P45 and they say they want it changing. They left in week 52 and were paid in week 1 so I'm not sure what to do now.

Hi
As their final payment was made after their leaving date, this would not be included in the P45.
The final payment of wages should be treated as a payment after leaving and the employee should receive a separate payslip confirming the pay and tax details for that pay period only (week 1 of 2023/24).
They should not be given a further P45 after their final payment of wages has been processed. 
Thankyou.

Thank you. Do I need to reverse the payment made in week 1 as I didn't change the tax code to 0T and the week number? If so this then makes the nett payment a negative amount and Sage 50 payroll will not process a negative amount so I'm stuck as to what to do?

Hi
If the information has not been reported correctly then possibly, I would suggest contacting us on 0300 200 3200 to discuss this in more detail as we may need further information.
Thankyou.