Enter/Match invoice issue

Hi all,

My client has GP 10 and when the user received items(purchasing>>Transactions>>receiving transaction entry).They updated stocks but when another user goes to enter/match invoices he cant see the receipt document the relates to receipt hence he cant pay the  supplier.The receipt items have already been issued to customers.GL is already updated too.

Now the question is

1.) how can I make the rctXXXXXXX appear in Enter/Match invoice so that payment can be made to supplier or

2.)how can I delete the whole receipt from all tables involved or front end to allow a new receiving of items.

please help me guys.