PaymentThanks

Automatically sends a personalized thank you email when an invoice is marked as paid in Dolibarr. The paid invoice is attached as PDF (regenerated with payment details). Optional watermark with customizable text (default: "PAID") displayed diagonally on the PDF. Trigger-based: email is sent instantly when clicking "Classify paid", no cron job needed. Uses native Dolibarr email templates for full customization. Anti-duplicate protection ensures each thank you is sent only once per invoice. Agenda event created automatically for traceability. Contact billing priority with thirdparty email fallback. FPDI library included. Compatible Dolibarr 16+ / PHP 7+.