Prepayment Invoice

To All,

 SCENARIO:

We make a prepayment invoice by cheque to a supplier. After a month the supplier returns a cheque to us.
 

This is my Scenario

STEP# 1) Make a prepayment invoice on dated 01-JAN-2010.

STEP# 2) Make a payment on prepayment invoice on dated 01-JAN-2010.

STEP# 3) Cheque present to un present list from cash management.

STEP# 4) My cheque returned due to contract cancelled on dated 01-APR-2010 .

My Question is

1)Which date i void my cheque?

2) Which date i cancel my Prepayment invoice?

3) Which date my cheque remove to cash management list.

If we remove in back date this may disturb our reconcillation.