Originally Posted by
smmrfld
Regardless of what the T&Cs say, you don't have to use a Hilton-branded AMEX. I, and colleagues, have consistently had the bonus post using a non-Hilton card; the system appears to have no way to differentiate.
I think it does. Many times I have used another Amex and it doesn't post automatically. However, if you call in later you are correct, as the system only indicates Amex.