You can void checks from the Check Ledger Entries window. This will be necessary if, for some reason, the check is not cashed by the bank. You can choose whether you want to unapply the underlying bank ledger entry and the corresponding G/L entries or just reverse the entries. For a check to be financially voided, the Entry Status field on the check ledger entry must be Posted.
Open the 
Check Ledger
Entries window. Select the line with the check that is
to be voided.
Click Check, Void Check. The Confirm Financial Void window appears.
In the Void Date field, enter the date the check should be voided.
Select one of the following options for Type of Void:
Unapply and void check: the payment will be unapplied so that the vendor ledger entry for the invoice will be open, and the payment will be reversed by the voided check.
Void check only: the vendor ledger entry will still be closed by the payment entry, and the voided check entry will be open.
Click Yes to void the check.
The program creates a new entry with the posting description Voiding check xx. The Entry Status field on the check ledger entry is changed to Financially Voided.
You cannot void checks posted in a non-balancing transaction.
If you want to re-issue a check that has been voided, you must enter a new payment in the payment journal. If the voided check was unapplied, you apply the new check to the original invoice entry. If the voided check was not unapplied, then you must apply the new check to the vendor ledger entry that was created by the program when the check was voided.
If you decide not to use one or more of the printed checks, you can void one or all of the checks in the payment journal.
Open the Payment Journal window.
To void one check, select the line with Computer Check in the Bank Payment Type field. Click Payments, Void Check.
To void all checks, simply click Payments, Void All Checks.
You cannot void checks posted from a journal template with a check mark in the Force Doc. Bal. field.