diff --git a/server/vbv_lernwelt/payment/README.md b/server/vbv_lernwelt/payment/README.md
index 4c4d4202..f7b59725 100644
--- a/server/vbv_lernwelt/payment/README.md
+++ b/server/vbv_lernwelt/payment/README.md
@@ -1,5 +1,10 @@
 # Datatrans - Proof of Concept
 
+## Setup manual steps
+
+- `HMAC_KEY`: https://admin.sandbox.datatrans.com/MerchSecurAdmin.jsp
+- `BASIC_AUTH`: `echo -n "{merchantid}:{password}" | base64` (`merchantid`: `11xxxxxx`): https://admin.sandbox.datatrans.com/MenuDispatch.jsp?main=1&sub=4
+
 ## Links
 
 - https://admin.sandbox.datatrans.com