Receivables
A bill to a company is an invoice that is owed; a receipt is allocated to named invoices and the shortfall has a name; the debtor is reminded, and a debt is forgiven only with a signature.
The city ledger used to be a master folio per company: the guest's bills moved onto it, the company's cheque was a payment on it, and the ageing read the folio's balance. Fourteen bills and one payment were one row that said "on account".
An invoice that is owed
Every bill transferred to a company or an agent is an invoice on its ledger with a due date from the party's terms. The ageing is by invoice — current, thirty, sixty, ninety — per branch and rolled up per group, and the group's statement shows the branch-wise subtotals.
A receipt is allocated
The remittance advice says "₹3,80,000 against invoices 41, 43 and 47, less ₹7,600 TDS under 194C". Each part of that sentence has a place: which invoices, how much each, the TDS the customer deducted as a receivable against the Income Tax department, and a short payment as a shortfall with a reason — dispute, discount, rounding. An unallocated advance is held at the group level until it is applied.
The debtor is reminded
Reminders on a schedule the hotel switches on, per company, with what was promised recorded against who promised it. A debt that will never come is written off with a signature — a reason, a name, a journal — and the provision for doubtful debts is a rule, not a guess in March.