Originally Posted by
chitownflyer
The best certs to acquire are the TCV certs with a PIN, as they do not reduce the base fare and count towards PQDs. The old UA ecerts reduce the base fare and are one use only and can not be refunded.
Unless you don't care about PQDs, in which case the 1016 ecerts are definitely better. A 1016 e-cert is typically worth about 10-12% more than face value because it also reduces taxes.