The Open AR File and the Nightly File are one in the same. It contains the open invoices and available credit memos for the given day that add up to your open AR balance.
Open AR / Nightly File
1. Each night your company sends TermSync that secure file with your open account receivables.
2. That file creates all of the transactions within the application.
3. Once a transaction no longer appears on the file, TermSync knows it was completed and marks it as such. If it was closed outside of TermSync, it will show as completed. If it was closed within TermSync, it will show as paid.