diff --git a/main/reference/zoe-api/user-seat.md b/main/reference/zoe-api/user-seat.md
index 527722fdb..3f9b1e57a 100644
--- a/main/reference/zoe-api/user-seat.md
+++ b/main/reference/zoe-api/user-seat.md
@@ -66,6 +66,9 @@ redirecting escrowed assets in accordance with the result of the transaction.
 
 The promise will be resolved promptly once the seat exits.
 
+If there is no payment corresponding to the keyword, an error will be
+thrown.
+
 ## E(UserSeat).getOfferResult()
 
 - Returns: **Promise<OfferResult>**