Originally Posted by ronin

Which is interesting, as United's own FAQs it presents to customers seem to make no such FFC distinction:
https://www.united.com/en/us/fly/travel/credit.html

Can I use multiple travel credits?
Yes, you can use multiple credits of the same type in a single purchase. Future flight credits and travel certificates cannot be combined.

If the company has sent emails showing a specific expiration date, and your online wallet shows the same expiration date, don't see how an invisible, secret, internal different expiration date can bind the customer, such the company can offer a "goodwill" gesture of only half the amount promised. Especially when the consumer relied upon the company's representation to that effect, to the customer's loss. Seems like this must be confusing to both consumers and CSRs.