diff --git a/README.md b/README.md
index 67b3af1..dced64d 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,12 @@ npm run dev
 npm run dev -- --open
 ```
 
+### Guidelines & Validation of Swiss Qr Codes
+
+- Guidelines: https://www.paymentstandards.ch/dam/downloads/ig-qr-bill-de.pdf
+- Swico QR Validator: https://www.swiss-qr-invoice.org/validator/?lang=de
+- Six QR Validator: https://validation.iso-payments.ch/gp/qrrechnung/validation
+
 ## Building
 
 Solid apps are built with _adapters_, which optimise your project for deployment to different environments.