Need to customize receipt write off approval through BPM workflow

Summary:

We have the following business requirements related to the Receipt Write Off process:

Notification on Insufficient Limit:
The system should notify the user when a write-off cannot be created due to an insufficient limit, and the notification should also include the next user with a higher limit.

Restriction on Reversals:
Users should be prevented from reversing their own write-offs in the current or next period. Only other users with the appropriate limit should be able to perform reversals.

Full Amount Write-Offs and Refunds Only:
The system should only allow write-offs and refunds for the full receipt amount; partial amounts should not be permitted.