Access the Edit Vendor window by first choosing Vendors under the
Payables menu (or use the keyboard shortcut <cmd-H>) and then
double-clicking on the vendor name. Then, to unpay a vendor,
either choose Unpay under the Vendor menu or use
the keyboard shortcut <cmd-U>.
Figure 7.5.1 -- Delete Cheque Confirmation Window
Note: You may only unpay those cheques in the current pay period .
If the cheque number indicated in the confirmation window is the one you
wish to unpay, click 'Delete', otherwise click 'Cancel'. You will be prompted
to unpay all cheques which were paid in the current pay period.