diff --git a/bip-0070.mediawiki b/bip-0070.mediawiki
index 3e861db2..4666ff65 100644
--- a/bip-0070.mediawiki
+++ b/bip-0070.mediawiki
@@ -145,7 +145,8 @@ Payment messages are sent after the customer has authorized payment:
 |-
 | transactions || One or more valid, signed Bitcoin transactions that fully pay the PaymentRequest
 |-
-| refund_to || One or more outputs where the merchant may return funds, if necessary.
+| refund_to || One or more outputs where the merchant may return funds, if necessary. The merchant may return funds using these outputs for up to 2 months
+after the time of the payment request. After that time has expired, parties must negotiate if returning of funds becomes necessary.
 |-
 | memo || UTF-8 encoded, plain-text note from the customer to the merchant.
 |}