Lot of 4 United Airlines Discount Travel Cert. NO Value NOT Redeemable Unused

Lot of 4 United Airlines Discount Travel Cert. NO Value NOT Redeemable Unused UNITED AIRLINE $25 DISCOUNT TRAVEL CERTIFICATE This certificate from the '80s is currently Not Redeemable It's labeled as "NEW" because it has never been used. There is no expiration date specified. Note: Stains on Corner If you have any questions, comments or concerns please don't hesitate to reach out, we do our best to answer all questions that come to our inbox.