diff --git a/changelogs/server_server/newsfragments/2067.clarification b/changelogs/server_server/newsfragments/2067.clarification
new file mode 100644
index 00000000..4bd8176b
--- /dev/null
+++ b/changelogs/server_server/newsfragments/2067.clarification
@@ -0,0 +1 @@
+Add a note to the invite endpoints that invites to local users may be received twice over federation if the homeserver is already in the room.
\ No newline at end of file
diff --git a/data/api/server-server/invites-v1.yaml b/data/api/server-server/invites-v1.yaml
index 7d241c37..b1771018 100644
--- a/data/api/server-server/invites-v1.yaml
+++ b/data/api/server-server/invites-v1.yaml
@@ -20,7 +20,7 @@ paths:
     put:
       summary: Invites a remote user to a room
       description: |-
-        Invites a remote user to a room. Once the event has been  signed by both the inviting
+        Invites a remote user to a room. Once the event has been signed by both the inviting
         homeserver and the invited homeserver, it can be sent to all of the servers in the
         room by the inviting homeserver.
 
@@ -32,6 +32,10 @@ paths:
         [room version specification](/rooms) for precise event formats. **The request and response
         bodies here describe the common event fields in more detail and may be missing other
         required fields for a PDU.**
+
+        Also note that if the remote homeserver is already in the room, it will receive the
+        invite event twice; once through this endpoint, and again through a [federation
+        transaction](/server-server-api/#transactions).
       operationId: sendInviteV1
       security:
         - signedRequest: []
diff --git a/data/api/server-server/invites-v2.yaml b/data/api/server-server/invites-v2.yaml
index f42c8eea..6ac8bb3e 100644
--- a/data/api/server-server/invites-v2.yaml
+++ b/data/api/server-server/invites-v2.yaml
@@ -24,7 +24,7 @@ paths:
         This API is nearly identical to the v1 API with the exception of the request
         body being different, and the response format fixed.
 
-        Invites a remote user to a room. Once the event has been  signed by both the inviting
+        Invites a remote user to a room. Once the event has been signed by both the inviting
         homeserver and the invited homeserver, it can be sent to all of the servers in the
         room by the inviting homeserver.
 
@@ -36,6 +36,10 @@ paths:
         [room version specification](/rooms) for precise event formats. **The request and response
         bodies here describe the common event fields in more detail and may be missing other
         required fields for a PDU.**
+
+        Also note that if the remote homeserver is already in the room, it will receive the
+        invite event twice; once through this endpoint, and again through a [federation
+        transaction](/server-server-api/#transactions).
       operationId: sendInviteV2
       security:
         - signedRequest: []