Free night certificate 1-4, can I use this and upgrade it to a higher tier hotel?

Discussion created by athleticman on Sep 9, 2012
Latest reply on Sep 9, 2012 by tef6178

Anyone have experience with using a tier 4 free night certificate at a higher tier hotel and paying a cash surcharge for the upgrade?

2012 Spring MegaBonus Free Night Certificate, Category 1-4 Hotel