How do I delete a Direct Deposit bonus check?

I have taken over for the old accountant and he prepared a couple of bonus checks for 2 employees.  These checks were set up to be direct deposits in GP.  Instead of creating the ACH file and sending it to the bank, he instead used 2 blank checks and a typewriter to fill in the amounts and then gave those checks to the employees to cash.  The direct deposit never went to or cleared at the bank.  I need to know how to void the Direct Deposit, so that I can manually edit the checks and properly match up everything that actually took place.