Invoice details checklist: remove payment admin blockers

Use this as a practical payment checklist

This checklist concerns the customer’s payment process. It is not a complete statement of statutory invoice or VAT requirements. Check the separate GOV.UK invoice requirements for your business and invoice type, alongside professional advice where needed.

For practical processing, the Small Business Commissioner’s guidance recommends identifying the invoice recipient, confirming the payment schedule and requesting any purchase order early. The checks below turn those questions into a routine you can use for each customer.

1. Confirm where the invoice needs to go

Ask for the billing contact and their preferred submission route before you invoice. Your day-to-day contact may approve the work while a different person releases payment. If there is an accounts email address or a customer portal, record it and use the agreed route.

Keep evidence of your submission, such as the sent email or portal acknowledgement. Sending an email proves you submitted it; it does not prove the invoice was opened, accepted or added to a payment run. If those points are unclear, ask accounts to confirm the current processing stage.

2. Make the invoice easy to identify

Check the invoice number, customer name, issue date and description against your own records. Use the same invoice number in the email subject, the document and later reminders. A recipient should be able to match all three without deciding whether they refer to separate charges.

Describe the work in language the customer will recognise. For example, “September website maintenance for the North Street project” is easier to match to an internal approval than “Services”. Where several jobs are involved, show enough detail for the customer to check what the total covers.

3. Check the customer’s reference or purchase order

If the customer uses purchase orders, confirm the reference with them and compare it character by character before submission. “Waiting for approval” may mean the invoice cannot be matched to the order, rather than that someone has decided to delay payment.

Do not invent a reference to fill an empty field. Ask which reference applies to this job and whether it needs to appear on the document, in the email or in a portal field. Keep the answer with the invoice so you can reuse it accurately in a follow-up.

4. Reconcile the amount and agreed due date

Compare the total and currency with the approved work and any corrections already agreed. Where a payment or credit has been recorded, check the remaining balance before writing a reminder. Do not copy the original total into a chase if it no longer reflects what you are asking the customer to pay.

Show an unambiguous date, such as “4 November 2026”, and check that your email and invoice agree. If the customer queries the terms, resolve the query from the agreement rather than silently changing a date to make the invoice appear more overdue.

5. Check payment instructions and the reply route

Confirm that the payment instructions refer to your business and the correct invoice. If you include an online payment link, test the destination yourself and make sure it identifies the expected payment. If payment is by another agreed method, explain that method clearly rather than adding an irrelevant button.

Include a monitored business contact for questions. Ask the payer to tell you if they need a copy, have a reference query or believe they have already paid. Someone must own those replies: an unattended mailbox turns a small administrative problem into a longer exchange of unanswered reminders.

6. Keep a short invoice submission record

Save the result of the checks alongside the issued document. This copyable record concerns submission, rather than the separate history of later reminders. Use your existing business records.

Invoice submission record
Invoice number / current document version:
Work or billing period:
Amount / currency / agreed due date checked:
Customer reference confirmed by / on:
Submission route confirmed by / on:
Submitted to / at:
Email or portal submission reference:
Customer acknowledgement, if received:
Missing detail / person to ask / review date:

In a fictional example, INV-344 is submitted to the confirmed accounts mailbox on 2 November with PO-81. The sent email is saved, but no acknowledgement has arrived. Record “submitted; receipt unconfirmed”, rather than “approved”. If accounts later requests a delivery reference, add that missing detail and its owner to the record. The next message can ask about the actual gap.

Once submission details are settled, use the follow-up notes guide to record replies and the next review date. Keep “submitted”, “approved” and “paid” as separate facts.