diff --git a/.env.example b/.env.example
index d5d35ed..04e9dbd 100644
--- a/.env.example
+++ b/.env.example
@@ -30,3 +30,9 @@ ASSOCIATION_NAME="Sportsclub XYZ"
 # OIDC_GROUPS_CLAIM defaults to "groups" (JWT claim name for group list).
 # OIDC_ADMIN_GROUP_NAME=admin
 # OIDC_GROUPS_CLAIM=groups
+
+# Optional: Vereinfacht accounting integration (finance-contacts sync)
+# If set, these override values from Settings UI; those fields become read-only.
+# VEREINFACHT_API_URL=https://api.verein.visuel.dev/api/v1
+# VEREINFACHT_API_KEY=your-api-key
+# VEREINFACHT_CLUB_ID=2