> ## Documentation Index > Fetch the complete documentation index at: https://docs.paywise.de/llms.txt > Use this file to discover all available pages before exploring further. # Bookkeeping integrations > Hand open invoices from your bookkeeping software straight to paywise — no export, no retyping paywise reads open invoices directly from your bookkeeping, invoicing or payment software. You pick the unpaid invoices from a list, check the debtor data and submit the order. Invoice number, amount, customer data and the invoice PDF come along automatically. paywise **reads** from your system and never writes back. No invoice in your software is changed, cancelled or marked as paid. The product interface is German. This English documentation exists for partner and marketplace reviewers; German button labels are quoted where they appear on screen. ## Available integrations

API token. Payment term and dunning levels come from sevdesk.

Email address and API key. Real due date.

Billomat ID and API key. Reminders including dunning fees.

Via the MeinBüro marketplace. Reminders and payments included.

Via the orgaMAX marketplace. Reminders and payments included.

API key. For open club invoices and membership fees.

API key. Multiple accounts and brands supported.

Open accounts-receivable invoices from the property management system.

Import open items and upload statements to Belege online. ## How it works You connect your system once at [app.paywise.de/connect/](https://app.paywise.de/connect/). Depending on the provider you sign in there, store an API key, or install the paywise extension in your provider's marketplace. paywise lists your open invoices live from the connected system — with invoice number, recipient, invoice date, due date, total and **open amount**. The open amount is what paywise collects. The debtor's name and address are taken from your system. Where the provider supplies an invoice PDF, paywise attaches it automatically. The provider page explains which missing details or documents can be completed in the paywise draft and when you need to correct the source system instead. Answer the legal questions, accept the terms and submit. From here the case is a paywise matter — nothing further happens in your software. ## What applies to every integration The invoice picker uses **one** active import source at a time. Classic bookkeeping integrations and the DATEV import are generally alternatives. Deactivate an active DATEV import or disconnect the previous classic integration before switching. **easyVerein is an exception.** It is a separate collection-import source and can remain active alongside a bookkeeping or DATEV connection. When easyVerein is connected, the invoice picker uses easyVerein. Every integration is read-only. Your invoice and bookkeeping records stay unchanged. Payments that reach you after the handover still need to be reported to paywise by you. An invoice already handed to paywise is marked *Eingereicht* (submitted) in the picker and cannot be submitted twice. You can disconnect any integration yourself at any time. Collection orders you already submitted are unaffected — they are paywise cases and continue to be processed. Further invoice reading stops. If the integration also supplies the Mahnservice, running dunning processes are stopped or paused because paywise can no longer verify the current invoice status. Five integrations feed the **paywise Mahnservice** (pre-collection dunning) as well as the collection handover: **Lexware Office**, **sevdesk**, **WISO MeinBüro**, **orgaMAX** and **Stripe**. paywise then fetches your open invoices continuously and sends reminders on your behalf before a case becomes a collection matter. Details are on each integration's page. Every other integration is built for the handover only: you pick the invoices yourself and submit them for collection. Where your system supplies partial payments, paywise takes the amount actually outstanding rather than the full invoice total. Each integration page says whether partial payments are supplied. ## Questions Write to [info@paywise.de](mailto:info@paywise.de).