The month-end invoice collection checklist
Month-end invoice collection becomes difficult when the team cannot see what arrived, what is missing, and what has already been reviewed. This checklist creates one repeatable path from inbox collection to an accounting-ready archive.
Operational guidance only. Your responsible accountant should set the accounting, tax, and compliance policy for each client.
Download the printable checklist1. Define the collection boundary
List every inbox and channel where the client receives invoices: personal email, accounts payable addresses, shared mailboxes, supplier portals, and paper. Assign an owner to each source before collecting documents.
Agree the period cut-off and the treatment of documents that arrive late. A written boundary prevents the same inbox from being checked repeatedly by different people.
- Record each source and its owner.
- Confirm the accounting period and cut-off date.
- Separate invoices, receipts, credit notes, and statements.
- Document which sources still require a manual check.
2. Collect with the original source attached
Keep enough context to trace every document back to the message, inbox, or portal where it arrived. Renaming a PDF without preserving its source makes later questions harder to answer.
When collection is automated, verify the connection status and last successful sync before assuming the period is complete.
- Preserve the sender, message date, attachment name, and source inbox.
- Confirm that shared inboxes are included.
- Check sync failures and disconnected accounts.
- Retain the original file alongside extracted fields.
3. Check completeness and duplicates
Completeness is not the same as file count. Review recurring suppliers, expected billing patterns, and gaps in the sequence. Treat duplicate candidates as a review queue, not an automatic deletion instruction.
- Compare recurring suppliers with the previous period.
- Review missing invoice numbers or unusual date gaps.
- Match duplicates using supplier, date, amount, and invoice number.
- Keep a visible status for unresolved documents.
4. Validate the accounting details
Check the fields needed by the downstream accounting workflow. The exact requirements depend on the business and jurisdiction, so the responsible accountant should define the validation policy.
- Supplier identity and invoice number.
- Invoice and due dates.
- Currency, net amount, tax, and total.
- Billing entity, client, and accounting period.
5. Create an auditable handoff
Export a stable period archive with a clear naming convention and a record of unresolved items. The recipient should be able to understand what was included without reopening every source inbox.
- Group files by client and accounting period.
- Include a manifest or structured export where available.
- List missing and disputed items separately.
- Record who reviewed the period and when.