diff --git a/iam-functions-list.adoc b/iam-functions-list.adoc
index 644da48..7596e8b 100644
--- a/iam-functions-list.adoc
+++ b/iam-functions-list.adoc
@@ -3,6 +3,7 @@
 *User management, user concerns*
 
 identity registration, enrollment +
+IdP of last resort +
 identity proofing +
 credentialing +
 account validation +