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paywise for FastBill

FastBill
The FastBill integration hands open invoices from FastBill straight to paywise for collection. Invoice data, customer data and the invoice PDF come along automatically.
paywise reads from FastBill and never writes back. Nothing in your bookkeeping is changed, cancelled or marked as paid.

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Before you start

  • A FastBill account with API access.
  • A paywise account.
  • At least one open invoice in FastBill.
  • No active DATEV import may exist for your paywise company. Deactivate it under DATEV Einstellungen → Gefahrenzone → Integration deaktivieren before connecting FastBill.

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What paywise reads

The credentials are used read-only.
FastBill does not expose reminders over its API. Reminders you sent from FastBill therefore cannot be imported — you record them by hand when submitting.

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1. Connect FastBill

You need two things from FastBill: the email address of your FastBill account and your API key. Both are found in FastBill in your account settings, in the section covering API credentials.
1

Open the connection page

Go to app.paywise.de/connect/fastbill/.
2

Enter the credentials

Enter the E-Mail Ihres FastBill-Accounts and paste the API-Schlüssel (API key) into the second field.
3

Accept the terms and save

Tick Ich akzeptiere die Nutzungsbedingungen and choose API-Schlüssel testen und Verbindung speichern (test API key and save connection).paywise verifies the credentials directly with FastBill and saves the connection only after a successful check.

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2. Submit invoices for collection

1

Open the invoice picker

On the FastBill page in paywise, choose Rechnungen einreichen.
2

Pick the invoices

paywise lists your open invoices live from FastBill — with invoice number, customer, invoice date, due date, total and open amount.The due date comes straight from FastBill; paywise calculates nothing here. paywise subtracts partial payments reported by FastBill from the total and submits only the remaining open amount.
3

Check the debtor data

Name and address come from the FastBill customer, the invoice PDF is attached automatically. Review and correct anything missing.
4

Record your payment reminder

Since FastBill supplies no reminders over its API, enter how and when you asked the debtor to pay — in writing or verbally, the date, and any payment deadline you set.This matters legally: for consumers a reminder is normally required before default interest and collection costs can be claimed.
5

Send the order

Confirm how collection should start, answer the legal questions, accept the terms and choose Auftrag absenden.

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Invoices that cannot be submitted

  • Drafts. Only issued invoices appear in the picker.
  • Incomplete recipient details. paywise imports the invoice as an editable draft. Complete the name and address in paywise before submitting the order.
  • Already submitted invoices are shown as Eingereicht.

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3. Disconnect

On the FastBill page, choose Verbindung löschen and confirm with Löschen. paywise removes the stored key and stops reading invoices. Orders you already submitted are unaffected. You can store the key again at any time.

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Troubleshooting

Check the email address and API key. Both must belong to the same FastBill account.
The key was reset in FastBill. Fetch a current key and store it again.
paywise shows only open, issued invoices. Check the invoice status in FastBill.
That is by design: FastBill does not expose reminders over its API. Record them by hand when submitting.

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Questions

Write to [email protected].