We have a vendor that we entered numerous vouchers for and instead of sending out a check through DBA we paid some of the vouchers by electronic funds tranfer.  Each voucher is distributed to multiple GL accounts.  Since this was paid by EFT what is the best way to remove this amount from the vendors aging? If we enter a credit memo, do we have to credit each GL acct that it was originally distributed to?

Just pick them to pay and process a dummy check printing to blank paper or to the sceen.  That is the way all electronic payments should be processed.  DBA still needs to "print" a check to process the payment.