diff --git a/src/fiber_package/action/request/list.py b/src/fiber_package/action/request/list.py
index 58f7db9..e599100 100644
--- a/src/fiber_package/action/request/list.py
+++ b/src/fiber_package/action/request/list.py
@@ -25,3 +25,9 @@ class ListCommitteeEditionsRequest(BaseModel):
     committee: UUID7
 
 ListCommitteeEditionsResponse = list[BaseModel]
+
+# List Guilds
+
+class ListGuildsRequest(BaseModel):
+    association_tag: str
+    query: str | None = None
\ No newline at end of file
diff --git a/src/fiber_package/event/activity.py b/src/fiber_package/event/activity.py
index c0aeae7..72a0734 100644
--- a/src/fiber_package/event/activity.py
+++ b/src/fiber_package/event/activity.py
@@ -27,7 +27,7 @@ class ActivityModel(CommunicationModel):
 
     payment_info: ActivityPaymentInfo | None = None
 
-    form: list[FormElementUnion]
+    form: list[FormElementUnion] | None = None
 
     signups: SignupRefList = SignupRefList([], "signup")