Has anyone else experienced entering a manual check and then not seeing it in the check register.  This has been happening to us a lot.  When we go to reenter the manual check a message pops up "This invoice number already exists in vendor file.  Please enter a new invoice number for this invoice"  This is a really big problem because checks have been written that are not coming out of the balance!!!!Please help!!!

Yes I am possitive the correct account is being used, we do have two bank accounts though and I don't know if there is something that I need to double check in the accounting defaults.  It is like the check is not going through all the correct postings in the database, it is getting stuck in limbo.  This does not happen all the time just some of the time.  Usually when a manual check is written, you can go through AP-B pull up the info and edit or reverse it.  When this odd thing happens with the checks, going through AP-B to pull up the check it gives the message that this invoice number already exits....like stated in my first message, but it was entered as a manual check not an AP-voucher.  We run two companies through DBA and this only happens in one of the companies.

Thanks for the advice here is what I found
The check is in the list to void the date is right and the bank is right, but these are manual checks so it won't let you void it through this method.  It tells you to go through AP-B and reverse it.  Going through AP-B and trying to void the check gives this message "This invoice number already exists in the vendor file. Please enter a new invoice number for this invoice."  I did not enter an invoice and then pick and pay.  I went through AP-B and entered a manual check and printed it right from there.  The checks this happens to are not showing up in the check register.  We usually do not find this out until we go to reconcile and the check is not in the list, but it was entered, it is just not showing up in the check register.  The checks are not showing up in the vendor payment history either, and that is by picking all bank accounts as the filter.  I am really at a loss, I think we have a problem in our program.

AP-B has always had manual check as an option and I use it often without posting problems.   Is the check register the only place it is missing (it is in the trial balance?)