Invoice processing services
Invoice processing automation services
Switching supplier invoices to an automated process touches suppliers, approvers, the bookkeeper and your accountant. An invoice processing service plans the change so no invoice is lost in the move, sets up a queue where exceptions are dealt with promptly, measures how accurately invoices are being read before trusting it, and agrees approval rules that match how your business spends money.
This page explains what the service involves. The main invoice processing page describes the automated flow itself.
Illustrative diagram
Invoice processing service
- Rollout
- One address
- Parallel run
- Accuracy
- Samples
- By supplier
- Exceptions
- Owner
- Daily routine
- Controls
- Duplicates
- Bank details
Rolling out without losing invoices
List suppliers
Who sends invoices, how and how often.
Output: Supplier list
Set up capture
One address and a scan step for paper.
Output: Single route in
Tell suppliers
Notice of the new address with a switch-over date.
Output: Suppliers informed
Run in parallel
Old addresses forwarded and checked for a period.
Output: Nothing missed
Close old routes
Forwarding kept, but staff stop processing directly.
Output: One process
Measuring reading accuracy
Before letting extracted data post without full review, check a sample: compare the extracted supplier, invoice number, dates, net, VAT and total against the invoice for a few weeks of real invoices. Record accuracy by field and by supplier. Suppliers whose invoices read reliably can move to lighter review; those that do not can be asked for a different format or kept under full review. Repeat the sample periodically, since suppliers change their layouts.
Accuracy targets should be agreed with your bookkeeper, not assumed.
What lands in the exceptions queue
Unreadable or uncertain
Fields below the confidence threshold.
Possible duplicate
Same supplier and number, or similar amount and date.
No match
Order or delivery not found, or prices differ beyond tolerance.
Unknown supplier
Not yet set up, or bank details differ from those held.
Running the exceptions queue
Give the queue an owner and a daily routine, so exceptions do not age into late payments. Each item should show why it was flagged and what action resolves it: confirm the field, query the supplier, link the order or reject. Track how many exceptions arise and why; recurring causes, such as one supplier's layout or missing order numbers, can usually be fixed at source.
Agreeing approval rules
| Situation | Approval |
|---|---|
| Matched to an approved order within tolerance | No further approval, or light review |
| Regular bill at expected amount | Automatic within agreed limits |
| No order, normal amount | Budget holder |
| Above a set value | Budget holder and a second approver |
| New supplier or changed bank details | Finance check before any payment |
Records your accountant can find
Each posted bill should have the invoice image attached and a record of who approved it and when. HMRC's VAT record-keeping notice says business records for VAT should generally be kept for at least six years and allows scanned invoices to replace originals where they contain all the required details, with some documents still needed in original form. Agree the storage location and retention with your accountant.
Example: a month-long switch-over
Illustrative example — not a client case study
Situation: A business with around eighty regular suppliers wants invoices processed automatically without missing any during the change.
- Suppliers are emailed the new invoice address with a date four weeks ahead; old staff addresses forward invoices automatically.
- For the first month, every extracted invoice is reviewed and accuracy recorded by supplier.
- Reliable suppliers move to exception-only review; three are asked to change how they send invoices.
What this shows: No invoices were lost, and review effort fell as accuracy was proven. This example is illustrative.
What you should receive
Process
- Capture address and scan routine
- Approval rules
- Exceptions queue owner and routine
Evidence
- Accuracy results by supplier
- Parallel-run findings
Controls
- Duplicate and bank-detail checks
- Approval records
- Support contact
Working with suppliers
A short, polite notice explaining the new invoice address, the details every invoice should carry, such as your order number, and how to query a payment helps suppliers adjust. For suppliers who keep sending to old addresses, forwarding catches the invoice and a reminder follows. Suppliers able to send structured electronic invoices can be offered that option, since it removes reading errors completely.
Training approvers
Approvers need to know what they are confirming: that the goods or services were received and the amount is right, not just that the invoice exists. Show them how to approve from email or a phone, how to query and how delegation works when they are away, so approvals do not stall during holidays.
Questions about invoice processing automation services
How do we avoid losing invoices during the change?
One capture address, notice to suppliers, forwarding from old addresses and a parallel run.
How is reading accuracy measured?
By comparing extracted fields with real invoices on a sample, by field and supplier.
What goes in the exceptions queue?
Uncertain readings, possible duplicates, unmatched invoices and unknown suppliers.
Who runs the queue?
A named owner with a daily routine, so exceptions do not cause late payments.
Can matched invoices skip approval?
Often, when matched to an approved order within tolerance, if your controls allow it.
Where are invoice images kept?
Attached to each bill, in a location and for a period agreed with your accountant.
Sources referenced
Platform features, guidance and rules change. We check the current versions before committing to an approach. This page is general information, not legal advice.
- HMRC (GOV.UK): VAT Notice 700/21: keeping VAT records (opens in a new tab) — reviewed 2026-10-23
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