How to print receipt with auto number

[jalals]

Hi!
How can I print the receipt No. to the students who have paid the examination fee. Every student should get a unique receipt No. The computer must loop the number in the Form where the fee is recorded for receipt.

Thanks

Jalal

[orange]

Your title mentions auto number --- Here is a reference that may be useful.
http://www.utteraccess.com/wiki/index.php/Autonumbers