diff --git a/event_registration.md b/event_registration.md
index a4cb00d..9062caf 100644
--- a/event_registration.md
+++ b/event_registration.md
@@ -171,6 +171,8 @@ Other contact tracing apps in Germany that leverage QR codes for Presence Tracin
 
 **Note:** QR codes that are generated by other contact tracing apps must be allowlisted individually per app (based on the hostname in the QR code) before they can be scanned and are accepted by CWA. Such contact tracing apps must ensure that they do not process or store any information from the CWA part of the QR code.
 
+Representatives of other contact tracing apps may request allowlisting from the Robert Koch Institute through e-mail CoronaWarnApp@rki.de.
+
 Examples:
 
 ```text