Invoice to cash, and bill to payment — both sides, one ledger.
AP and AR invoicing, vouchers, and credit and debit notes on both sides of the ledger — with cash applied to the specific invoice it settles, not just parked in a suspense account.
Both sides of the ledger, closed properly
AP & AR invoicing
Invoices on both sides, with document numbering, tax codes, and aging — not a spreadsheet tracking who owes what.
Vouchers & credit/debit notes
Payment vouchers, receipt vouchers, and credit/debit notes — sharing one posting routine so they can't drift apart.
Cash application
Collect or pay an invoice and apply cash to the specific invoice it settles — closing it out instead of leaving it sitting in a clearing account.
Not just the standard invoice-and-pay case
Sister-company vouchers
Pay or collect cash on behalf of a sister legal entity — posts straight to the intercompany Due from/Due to Sister Companies account, not a manual adjustment.
Miscellaneous purchases & sales
Record and post an ad-hoc purchase or sale paid or collected directly, with no separate vendor or customer invoice behind it.
Interest billing
Charge simple interest on overdue customer invoices and post it as a debit note, instead of writing it off or chasing it by hand.
Know exactly who owes what, and for how long
Aging, on both sides
Current, 1-30, 31-60, 61-90, and 90+ day buckets for every open payable and receivable, by party or by legal entity.
Statements of account
A full statement of activity for any vendor or customer, ready to send without being rebuilt from a filtered invoice list.
Account managers
Assign an internal account manager to each vendor or customer, so ownership of a relationship is a real field, not tribal knowledge.