Customer overpayment control means identifying the excess, confirming its purpose and tracking the amount until an authorised refund or allocation is completed. Do not create another sale just to absorb the money. A customer may have paid twice, paid in advance or used an incorrect reference, and those explanations require different follow-up.
Confirm the invoice and receipt
Match the bank receipt to the correct customer and compare it with the open invoice balance. Check earlier receipts, credit notes and allocations before deciding that an excess exists. Keep the payer name and remittance advice because a group company may pay on the customer’s behalf.
For example, an invoice has an outstanding balance of S$800 and a confirmed S$1,000 receipt arrives. The S$200 difference needs its own explanation. This differs from a credit note reducing the agreed sale: the invoice may be entirely correct while the customer has simply transferred too much.
Ask how the excess should be used
Contact the customer through a known channel and record the reply. If it is an advance against a future order, ask the accountant to review the records and tax treatment. If the customer requests a refund, obtain the required internal approval and verify the destination through the company’s payment controls.
Do not accept a last-minute email changing the refund beneficiary as sufficient evidence. Escalate unexpected third-party payment requests. This is an accounting and fraud-control step, not permission for the bookkeeper to make an unapproved bank transfer.
Keep the customer credit visible
Use the accounting system’s approved process to show unapplied money or a customer credit. Keep the link to the bank receipt and original invoice. Do not net the excess against an unrelated customer balance. Review the outstanding credit list so that small amounts do not disappear from attention when staff change.
Close after settlement evidence
For a refund, reconcile the approved payment to the bank transaction and customer account. For an allocation, record the later invoice and the customer’s instruction. Have a reviewer check that the same credit has not been refunded and applied to a new invoice. Retain the correspondence and reconciliation with the transaction support.
Related practical guidance
For the surrounding work, see bookkeeping basics, bookkeeping and accounting, company records to keep.
Official guidance: IRAS company recordkeeping requirements.
Help with your company records
For accounting, bookkeeping and related compliance support, contact Raffles Corporate Services at [email protected] or WhatsApp +65 8501 7133. Tell us which records or process need attention so we can discuss the relevant next steps.
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