Plain definition
Bookkeeping records transactions from evidence and keeps the detailed accounting records current. It is not simply typing an invoice: the record must reflect what happened, when it happened, and which accounts it affects. Accounting later reviews and explains those records.
Illustrative example
Monetary examples use Saudi riyals (SAR). The same principles apply in other currencies.
Suppose a warehouse receives inventory costing on 28 June. The bookkeeper matches the supplier invoice to the purchase order and receiving record, then records inventory of and a supplier payable of . When the company pays in July, cash falls and the payable is settled; the payment does not record another purchase or an expense.
The records show June stock and the unpaid supplier obligation before the owner decides how much cash can be committed elsewhere.
An approved purchase order alone does not prove receipt of goods.
Why it matters
If the invoice waits until payment, June can look more profitable and less indebted than it really was. That can produce a cash decision based on an obligation already created.
Practical consequence
For purchases, match the order, receiving evidence, invoice, and payment. Record exceptions—such as a price difference or missing receipt—against a named owner. Before close, review goods received without invoices and invoices without receiving evidence rather than posting either to a generic clearing account.