Rieck Invoice puts payment inside the invoice itself, so the customer can pay straight from the document. The payment is matched and booked in your own accounting system. And if the money never turns up, the reminder, the dunning letters and the collection all carry on within the same case.
Several hundred companies have automated their flow with Rieck.
The idea behind it
Invoicing, payment and follow-up are one and the same journey
The invoice can be paid on the spot. Payment sits inside the document. The customer picks card, MobilePay or a link while the invoice is open in front of them.
The numbers land in the ledger you already keep. Customers, items and prices come from your accounting system, and the payment is booked back into the same place.
When the deadline passes, the case moves on. The invoice changes status on the due date, and from there the reminder, the dunning letters and the collection case carry on within the same case.
How it works
The five steps every invoice goes through
The invoice
Write the invoice from data you already keep
Pick the debtor and add the lines with quantity, unit price and discount. VAT is calculated as you go, and the payment terms set the due date.
The invoice takes the next number in the series, and the PDF is generated and locked with a digital fingerprint. If something needs correcting afterwards, it is done with a credit note — so you can show what said what, and when.
Sequential numbering
PDF locked from the moment it is issued
Corrections are made as credit notes
Issued and lockedInvoice 2026-1203 · 7 August 2026, 09:01SHA-256 · 7b21…d904
Payment
The payment goes out with the invoice
The pay button sits in the document. The customer picks card, MobilePay or payment link — from a phone as easily as a desk.
The payment is registered, matched to the right invoice and booked in your own accounting system. The balance is correct next time the bookkeeper looks.
Matched and booked in e-conomicSame day, and the entry sits in your own ledger
Follow-up
If the customer does not pay, the follow-up carries on
From the due date the sequence runs on its own: first a reminder, then the dunning letters, and if that still does not land, collection and, where needed, the bailiff court. All of it on the same case and on your own letterhead.
A reminder on the due date itself
Up to three dunning letters (Danish Interest Act § 9 b)
Collection on the same case
Invoice 2026-1204The case continues where the invoice left off
Sent14 Aug
OverdueDay 0
1st reminderDay 10
CollectionDay 40
Connecting to your systems
Rieck sits on top of what you already use
You are not changing your accounting system. Customers, items and prices are pulled from the ledger you already keep, and the entries are written straight back — your chart of accounts, your registers and your auditor all stay where they are.