Why you should send invoices as PDF, not Word or a photo

A PDF renders identically everywhere, cannot be casually altered, and is what finance systems expect. A photo of a handwritten note often cannot be processed at all.

A Word document reflows on the recipient's machine — different fonts, different page breaks, sometimes a total that lands on page two on its own. Worse, it is editable, which in a dispute is a genuine problem.

A photograph of a paper invoice fails differently: many accounts systems cannot read it, and it cannot be forwarded into an approval workflow. It reads as informal, which is not the impression you want attached to a request for money.

What PDF gets you

It renders identically for the recipient, on any device, without the fonts and layout collapsing. It prints correctly. It attaches to accounting systems and invoice portals, most of which accept PDF and nothing else. And it is not casually editable, which matters for a financial record.

The problem with a Word or spreadsheet file

It can be altered — by them, by you, or accidentally. An editable financial document sent to a customer is a document whose contents you can no longer evidence. It also reflows: your carefully aligned invoice can arrive with the total on a second page because their default font differs from yours.

And some accounts systems simply reject anything that is not a PDF, which means a silent rejection you find out about by chasing.

The problem with a photograph

A photo of a hand-written invoice sent by message is common in the trades and it costs money. It cannot be forwarded to an accounts system, it cannot be searched, it is often unreadable when printed, and it makes a business look like it does not have a process. If the person approving payment cannot file it, it waits.

Name the file so it survives their downloads folder

INV-0042-Marlow-Kitchens.pdf is findable in six weeks. invoice.pdf is one of forty files with that name, and IMG_4471.jpg is worse. A small thing that removes a genuine source of delay.

Body text matters as much as the attachment

Put the essentials in the message as well as the file: invoice number, amount, due date. Some people act on the email without opening the attachment, and an email saying only "invoice attached" gives them nothing to act on and nothing to search for later.

Send it to the right address

Larger customers have an accounts inbox, and sending only to your contact means it waits for them to forward it. Send to accounts, copy your contact. Where a portal is required, the portal is the only route that counts — emailing a PDF to someone helpful does not enter it into their system. Getting paid by large companies covers the routing.

Keep your copy

The PDF you sent is the record. Whatever produced it should keep it, because reconstructing an invoice from an accounting entry is not the same as producing the document, and the document is what retention rules require. How long to keep invoice records covers the periods.

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