A/P will not allow a zero cheque so how do I post payments that were made online for vendor invoices.

AP will not allow zero dollar checks if it has been marked to be printed. It will allow if the Print Check option is removed.

If you want to log a payment into Payables but do not want to print the check, ensure that the Print Check option is not selected.

The above will work if you only used Adagio Payables.

You might consider Adagio BankRec if you really want a cool solution for EFT, and automated banking.

Your EFT payments downloaded with all your bank account details, can be applied from the autocreated Bank Rec batch, and applied directly using the EFT reference (Alphanumeric) to the AP Vender's open invoice transaction, as a manual payment. The EFT payments are left over after the BankRec matches and kills (clears) the recorded cheques and deposits.

Best,
Brian