Why foreign customers send your invoices back for correction

Many buyers key invoices into their system by hand, and the clerk looks for the supplier’s tax number in a set spot. If your number sits in the footer when their clerk expects the header, the invoice goes back with a note. Clerks work from habit.

Format matters as much as position. Small differences fail checks. A VAT number printed without its country prefix, such as DE or FR, or with spaces where the buyer’s validation wants none, fails the automatic check on entry. The buyer’s number matters too, and it must match their registration exactly.

Check the supplier number, the customer number and the legal name of both; a trading name in place of the registered name is a frequent cause. Check both names.

Some countries want a set sentence on certain invoices. Examples are a reverse charge note for a sale to a business in another member state, or an export exemption reference. Leave it out and the buyer cannot claim the treatment.

Others want the IBAN and SWIFT code in a set form, a due date written out, or the seller’s company registration and registered address in the footer. A purchase order number is a common demand from large buyers. Large buyers insist on it.

Your adviser knows the lines required for each route. Attach lines by layout. The task for the team is to attach them to the right layout automatically, not to remember them at invoice time.

A date written 04/05/2026 reads as the fourth of May in one country and the fifth of April in another. A due date read wrongly can start late-payment reminders on an invoice that is not yet due.

The fix is a layout that prints the month as a word, such as 4 May 2026, or follows the buyer’s own order. Numbers mislead too, because a comma is a decimal mark in one country and a thousands mark in another. Check totals twice.

Address order and name order cause quieter errors. A postcode before the town, or a family name first, makes a mail room misfile the document. Mail rooms misfile things.

Some countries require invoice numbers to run in an unbroken sequence per entity. Auditors notice gaps. A deleted draft or a reissued invoice under a new number leaves a gap, and an auditor asks why.

The safe route is to leave the original invoice alone and issue a credit note that refers to it by number, then raise a fresh invoice. Each document keeps its own number. Overwriting the original hides the history the buyer’s auditor wants to see. History must stay visible.

A credit note needs its own series in many places, and it must quote the original date and number. One slip, another return. Missing these is why a correction is itself sent back.

Build one layout per region, and ask the buyer’s accounts team or your adviser to approve a sample for each. Store the approved sample beside the template, with the date and the name of the approver. Keep the approver’s name.

When a new return arrives, find the cause, fix the layout once and send the corrected sample for approval again. Fix it once. The same mistake then cannot reach the next customer in that region.

Start now by pulling the last ten returned invoices and writing the reason beside each; the pattern will show which layout to fix first. Patterns show fast.