Join Date: Jun 2005
Location: PBI | Formerly CLT, LHR & AMS (with just a bit of PSP)
Programs: Proud AA CK Spouse, AA Plat, HH Diamond, BonVoy Titanium, Caesars7* (comp), Wynn Black, HR Icon
Posts: 8,208
In my personal experience, you shouldn't have an issue.
I have cancelled many COMP TR (CET) rooms less than 72 hours in advance; and have never had a charge. Also, in almost all cases you can cancel online; though, I have also done it over the phone.