Issue the invoice for the sale
Record the customer, date, currency, revenue lines and tax treatment that apply. Once issued, review the posted document and its balance. An invoice is evidence of a customer amount due, not proof that cash has arrived.
Record money received
When a customer pays, record the receipt against the correct cash or bank account. A single receipt may settle more than one invoice, or only part of one invoice. Keep the bank reference and remittance detail where available.
Handle money received before allocation
A customer may pay before identifying the invoices. Record the receipt as unapplied, then allocate it when the intended invoice is clear. Do not create extra revenue merely because money arrived.
Reconcile the customer position
Review the customer statement and aged receivables, then compare the receipt with the bank statement. If a payment is later refunded, follow the refund workflow and preserve the original receipt history.
Examples are illustrative, not tax or legal advice. Your accounting policies and local requirements may change the treatment.