Are Southwest Airlines vouchers transferable?

Q. If I have a Southwest Airlines travel voucher, can I transfer it to someone else or do I have to be the one to use it?

Adam answers:

Good news: You can give the voucher to someone else with no problem. All they need in order to use the LUV voucher is the voucher number and the security code associated with the voucher. The voucher number is 16 digits and the security code is 4 digits.

Note that you are not supposed to sell your voucher — that technically makes it void (although I don’t know how Southwest could possibly figure out it was purchased versus being given for free).