You Vibe-Coded a Product. Someone Bought It. Now They Want an Invoice.

You built something over a weekend with AI. Posted it online. Someone paid you for it.

And then the message arrives: "Hey, can you send me an invoice? I need it for my expenses."

You stare at the screen. You have no idea what to do next.

Nobody Teaches Makers How to Get Paid Properly

The vibecoding world is full of tutorials on shipping fast, prompting better, and building in public. There are zero tutorials on invoicing.

So most builders do one of these things:

• Send a PayPal receipt and hope that counts
• Make a PDF in Canva with a random number on it
• Ask the buyer to just trust the Stripe confirmation email

And honestly? It works. Until it doesn't.

When It Breaks Down

The buyer is a company. Companies need a proper invoice to claim the purchase as a business expense. No invoice, no reimbursement — and suddenly your buyer is annoyed at you for something you didn't know was your problem.

Tax time arrives. A Revolut payment labeled "chrome extension thing" is not a business record. You need documentation that shows what was sold, when, and for how much.

Someone disputes the charge. Without a formal invoice, you have no legal document proving a transaction took place for a specific product at a specific price.

You want to look serious. A proper invoice takes three minutes and immediately makes you look like a real business — not just someone who built something cool by accident.

What a Valid Invoice Actually Needs

Most people have never read the rules. Here's what a proper invoice typically requires:

• Your name or business name and address
• Your tax/VAT number (if applicable)
• The buyer's name and address
• A unique invoice number
• Issue date and payment due date
• A clear description of the product sold
• Price, currency, and VAT breakdown

If your buyer is a company in Denmark, they may also require Peppol/OIOUBL e-invoicing — a standardized electronic format that becomes mandatory for many transactions in 2026. Most makers have never heard of it. Worth knowing before a client rejects your invoice.

Invoicing Should Be as Fast as Shipping

You vibe-coded a product in a weekend. Invoicing it should not take longer than that.

Fakturify is built for exactly this moment — makers, solo builders, and small teams who just sold something and need to send a proper invoice without learning accounting software.

It's free, works in English, Danish, and Estonian, and is already built for the 2026 Peppol e-invoicing standard in Denmark.

You fill in what you sold, who bought it, and for how much. Fakturify handles invoice numbering, VAT calculations, PDF generation, and the legally correct format.

No credit card required.

A Real Scenario

You built an AI image tool and sold lifetime access to a startup in Copenhagen for 4,500 DKK. They need an invoice for their bookkeeping.

With Fakturify:

1. Log in, create a new invoice
2. Enter their CVR number — Fakturify looks up their company details automatically
3. Add your line item: "Lifetime access — AI image tool"
4. Set the price and VAT rate
5. Send — they get a clean PDF invoice, you get paid without drama

Three minutes. Done.

Stop Letting Invoicing Kill Your Momentum

You already did the hard part — you built something and sold it. Don't let a missing invoice be the reason a deal stalls, a buyer gets frustrated, or you end up scrambling at tax time.

Send your first invoice in under five minutes at fakturify.dk — free, no credit card, built for people who build things.

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Fakturify supports invoicing in Denmark with full CVR lookup, Danish VAT calculations, and 2026 Peppol/OIOUBL e-invoicing compliance. Available in English, Danish, and Estonian.