Originally Posted by
Zurich Flyer
"Voucher"?...! Every prepaid rate includes a "voucher" in the Hilton language and thus, all prepaid rates are excluded from the BRG
Not all pre-paid rates generate a voucher. Expedia and hotels.com don't send you a voucher (they usually book directly with Hilton). Other websites like gtahotels.com are consolidators who buy rooms at specific hotels and send you a voucher to redeem at the hotel.
Anyhow, buying a prepaid non-refundable rate from Hilton is highly not recommended, as there is a 100% chance they will deny your BRG for reasons that are not documented in their BRG (See the many excuses in this thread) and you'll get stuck with their high rate.