diff --git a/changelogs/internal/newsfragments/2190.clarification b/changelogs/internal/newsfragments/2190.clarification
new file mode 100644
index 00000000..019ac021
--- /dev/null
+++ b/changelogs/internal/newsfragments/2190.clarification
@@ -0,0 +1 @@
+Clarify that clients should replace events with the most recent replacement by origin_server_ts.
diff --git a/content/client-server-api/modules/event_replacements.md b/content/client-server-api/modules/event_replacements.md
index c4563a88..bce7e9fc 100644
--- a/content/client-server-api/modules/event_replacements.md
+++ b/content/client-server-api/modules/event_replacements.md
@@ -268,6 +268,11 @@ Client authors are reminded to take note of the requirements for [Validity of
 replacement events](#validity-of-replacement-events), and to ignore any
 invalid replacement events that are received.
 
+Clients should render the content of the **most recent** replacement event. The
+most recent event is determined by comparing `origin_server_ts`; if two or more
+replacement events have identical `origin_server_ts`, the event with the
+lexicographically largest `event_id` is treated as more recent.
+
 ##### Permalinks
 
 When creating [links](/appendices/#uris) to events (also known as permalinks),