Multiple checks printed for one vendor or one invoice in Accounts Payable (MICR settings not correct)

Either unmark Print using MICR encoding or change the Bank account use method to System automatically assigns per distribution:

Option 1: Keep the Operator specifies for entire check run setting and remove the Print using MICR encoding setting

Note: The Print using MICR encoding setting allows for multiple banks to be included in a single check run and does not affect the actual MICR printing.

In Accounts Payable, from the File, select Company Settings, AP Settings.
Click Payment Settings.
Unmark Print using MICR encoding.
Click OK to exit Payment Settings.
Click OK to exit AP Settings.

Option 2: Change the Bank account use method to System automatically assigns per distribution

In Accounts Payable, from the File, select Company Settings, AP Settings.
Click Payment Settings.
In the Bank account use method section, select System automatically assigns per distribution.
Enter the Default bank account.
Click OK to exit Payment Settings.
Click OK to exit AP Settings.
If desired, void the checks that were issued, add the bank account to the invoice distributions (see article DocLink: How do I change the assigned bank account on an Accounts Payable invoice distribution?), then print a new check.

Notes:

This change will not take effect retroactively. The Bank will need to be added to each invoice that was created before the Payment Settings change. See article DocLink: How do I change the assigned bank account on an Accounts Payable invoice distribution?
Bank accounts are assigned at the distribution level by first looking at the Job then the GL Prefix on the distribution. If there is a Job on the distribution, it will look for a bank in Job Cost, Setup, Jobs, AP and GL tab. If that is blank, the system will then look at General Ledger, Setup, Prefix/Base, the specific Prefix on the distribution. If that is blank as well, then it will look to the Default Bank in AP Settings, Payment Settings.