Resolution

Confirm from the receipt record where the payment was made.

Was it made in Payment entry or Lockbox process.

If it was a lockbox, does the file specify bill?
1. If the payment was made directly to the bill, as opposed to the account then next time have it paid to the account so the oldest bill is paid first.

If the account was paid through the account but oldest bill was not given priority payment:

Property Revenues > Accounts Receivable > Setup > Accounts Receivable Settings

Select the Payments tab and scroll to General Payments. Finds the Oldest bill to newest bill checkbox in the Process payments and transfers area. Ensure it is selected.
1. If not already selected, select Update then check the Oldest bill to newest bill checkbox and then Accept.

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