Create payment reminder
Create the next reminder for an overdue invoice and email it to the customer.
POST https://cotlet.dev/api/v1/sevdesk/invoices/{invoice_id}/payment-reminders
write Confirm
Creates the next reminder for an invoice and sends it by email. The first one is a Zahlungserinnerung; later ones are Mahnungen, which sevdesk offers from the Buchhaltung plan and bases on an invoice that already got a reminder. The text is prefilled by sevdesk unless you pass message, and the deadline comes from your Mahnfrist setting. By default you confirm each call; you can switch that off for this tool.
Parameters
| Name | Type | Description |
|---|---|---|
| invoice_id string required | string | Invoice ID from list_invoices. |
| message string | string | Text of the reminder. Default: the sevdesk standard text. |
Request
curl -X POST https://cotlet.dev/api/v1/sevdesk/invoices/41872618/payment-reminders \
-H "Authorization: Bearer $COTLET_API_KEY" \
-H "Content-Type: application/json" \
-d '{"message":"Hello Mr. Brandt, invoice RE-1031 was due on 28 September. Could you please transfer the open amount in the next days? Thank you."}'result = client.call("sevdesk", "create_payment_reminder", {"invoice_id":"41872618","message":"Hello Mr. Brandt, invoice RE-1031 was due on 28 September. Could you please transfer the open amount in the next days? Thank you."})const result = await cotlet.call('sevdesk', 'create_payment_reminder', {"invoice_id":"41872618","message":"Hello Mr. Brandt, invoice RE-1031 was due on 28 September. Could you please transfer the open amount in the next days? Thank you."});cotlet call sevdesk create_payment_reminder --data '{"invoice_id":"41872618","message":"Hello Mr. Brandt, invoice RE-1031 was due on 28 September. Could you please transfer the open amount in the next days? Thank you."}'Example response
{
"reminder_id": "88100412",
"invoice_id": "41872618",
"kind": "payment_reminder",
"status": "sent",
"sent_to": "billing@brandt-gmbh.example",
"sent_at": "2026-10-14T09:10:00+02:00"
}