diff --git a/shutdown_test.go b/shutdown_test.go
index 89c88b6..0cd29f6 100644
--- a/shutdown_test.go
+++ b/shutdown_test.go
@@ -72,8 +72,8 @@ func TestRecordsAfterCloseAreReportedOnce(t *testing.T) {
 	}
 }
 
-// Found by sending a 12 MiB record to the real endpoint: it answered 2xx and the record never
-// appeared, because the per-record limit is enforced after the request is accepted.
+// Found by sending a 12 MiB record to the real endpoint: it answered 2xx and replaced the record
+// with a notice row in the source, so the client counted as sent what never landed.
 func TestRecordOverTheSizeLimitIsDroppedBeforeSending(t *testing.T) {
 	server, requests := newServer(t, accepted)
 	errs := &errorList{}
diff --git a/transport.go b/transport.go
index 33f8051..111f23f 100644
--- a/transport.go
+++ b/transport.go
@@ -38,8 +38,10 @@ const (
 	dropReportInterval = 5 * time.Second
 
 	// maxRecordBytes is Better Stack's limit on one record's uncompressed JSON. The endpoint
-	// accepts a request whose compressed body fits and discards such a record afterwards
-	// without a word, so the check has to happen here for the drop to be visible.
+	// accepts a request whose compressed body fits and then replaces such a record with a
+	// notice row in the source. Checking here saves uploading megabytes that cannot land,
+	// reports the drop where the application can see it and keeps Stats honest instead of
+	// counting the record as sent.
 	maxRecordBytes = 10 << 20
 )