diff --git a/meteroid/api/events.py b/meteroid/api/events.py
index 9fc333f..7976cd0 100644
--- a/meteroid/api/events.py
+++ b/meteroid/api/events.py
@@ -47,7 +47,7 @@ async def ingest(
         Ingest usage events for metering and billing purposes.
 
         Events are deduplicated by `(event_id, customer_id)` — re-sending the same pair will not be
-        double-counted. If timestamps differ across duplicates, the event with the latest timestamp is used.
+        double-counted. The first copy received is kept and later copies are ignored, whatever they change.
 
         By default, any invalid event rejects the entire batch. Set `allow_partial_failures` to `true` to ingest valid events and receive per-event failure details in the response body.
 
@@ -111,7 +111,7 @@ def ingest(
         Ingest usage events for metering and billing purposes.
 
         Events are deduplicated by `(event_id, customer_id)` — re-sending the same pair will not be
-        double-counted. If timestamps differ across duplicates, the event with the latest timestamp is used.
+        double-counted. The first copy received is kept and later copies are ignored, whatever they change.
 
         By default, any invalid event rejects the entire batch. Set `allow_partial_failures` to `true` to ingest valid events and receive per-event failure details in the response body.