What Causes Double Payment on Invoice in Accounts Payable?

What Causes Double Payment on Invoice in Accounts Payable?

Version: 7.x & Up
Release Date: 07/23/2026

Q - Can you help explain why something happened? We have a double payment on an invoice.  In this example, we have a copy of the check #77716, dated 7/14, vendor #NEL01 and voucher #38300. At the next check run on 7/21, a different check for the same vendor and same voucher #38300 is printed again. We are unsure why or how this happened.

A - From my experience, in most situations the user forgot to post the prior check run (i.e., check #77716, dated 7/14/26, vendor #NEL01). At the next check run on 7/21, the system treated the non-posted check as VOIDED if the same vendor (i.e., NEL01) was repeated from the previous non-posted check list.

Generally speaking, vendor #NEL01 has a non-posted check from 7/14/26 (check #77716). The system will void check #77716 automatically if the user proceeds with payment (voucher #38300) again.

We suggest making the following rule for AP payments:
  1. Post check immediately after printing - do not sign the check if you do not see it on "Check Posting Journal."
  2. Quickly check both check runs if there are duplicated vendors (i.e., NEL01).


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