Hello zenith2010, welcome to the BA board.
It sounds like you have a CR credit or possibly an MCO. They can often be used by any immediate family member but if the last name is different, proof of family relationship is required - BA wants the aggrieved customer to give them another chance, or at least one of their relatives - so it isn't possible to 'gift' it to someone unrelated.
Other than using it towards a flight though, it is possible to use it towards British Airways Holidays products such as hotel or car rental - you can search for those on ba.com if you're interested, and then call 1-877-4-A-VACATION
(1-877-428-2228) to book. Maybe it could find some use there?