Window Letter layout
Window Letter invoice template
The address sits in the envelope window, with fold marks and a three-part letter foot.
What you see above is the whole document — every template stays visible whatever you pay. Making an invoice with Window Letter itself is not part of the Free plan: Free covers 6 of the 60 templates, which are the 6 the generator offers, and the rest arrive with the paid plan when it launches.
For the services listed below, rendered 01 Jun — 30 Jun 2026, we invoice you $11,030.00 USD. Payment is due by 16 July 2026, 15 days from the invoice date.
| Pos. | Description | Qty | Rate | Amount |
|---|---|---|---|---|
| 1 | Platform engineeringOrder pipeline refactor, background job scheduler and the accompanying migration runbook. | 82 | $95.00 | $7,790.00 |
| 2 | Design systemComponent audit and a print stylesheet for the customer-facing documents. | 24 | $85.00 | $2,040.00 |
| 3 | On-call supportJune retainer. | 1 | $1,200.00 | $1,200.00 |
| Subtotal | $11,030.00 | |||
| VAT (0%) | $0.00 | |||
| Total Due | $11,030.00USD | |||
Please quote invoice INV-2026-07-014 as the payment reference. Kind regards,
Sample data · A4 · rendered by the product
How this sheet is set
The Window Letter layout unskinned — Open Sans with IBM Plex Mono labels on the library's default blue. Nothing is added to the envelope geometry: the fold and punch marks bleed off the left edge so the sheet can be folded by eye.
The Window Letter layout
Dimensioned so the recipient's address falls inside the window of a standard envelope, with fold marks bleeding off the left edge and the issuer's particulars gathered into a foot block.
Who it suits
Invoices that are actually posted, and anywhere the printed letter is still the formal channel.
The voice a finance department reads without noticing it: neutral sans-serif type, plain hierarchy, enough weight to survive a photocopy, and no typographic opinion competing with the figures.
Modelled on the German business letter
Modelled on the geometry of the German business letter, DIN 5008 Form B: a fixed address field positioned for a window envelope, fold and punch marks down the left edge, and the issuer's particulars gathered into a foot block.
A tradition tag describes layout lineage and nothing more. It is not a compliance claim. The template prints exactly the facts you type: there are no per-line tax rates and no state-issued identifiers in the document model, and nothing is validated, registered or checksummed. Whether a given document satisfies a particular country's requirements is between you and your accountant.
What it prints
Every template in the library prints the same set of facts — a template that dropped one would fail the library’s own contract test. What changes between them is where the facts sit and how they are set.
- Issuer and recipient, each with an address, an optional contact line, and a tax label and number you write yourself.
- Invoice number, issue date, service period, payment terms or an explicit due date, and the date of the service agreement.
- Your own references — purchase order, contract, cost centre — labelled the way your client labels them.
- Line items with a quantity, an optional unit, an optional period, a rate and an amount.
- A note field, and full banking details with an optional payment reference.
Anything you leave empty prints nothing at all — no blank labels, no placeholder rows.