"University of Pennsylvania's Marriott code 4309 is an academic institutional code. No FlyerTalk thread discusses UPenn verification incidents. University institutional codes at Philadelphia-area Marriott properties are familiar and unchallenged. Academic travel patterns (conferences, academic visits, faculty stays) are the lowest-scrutiny category at Marriott full-service and select-service properties."

"It’s about 80/20 for me. 80% of the time I still have to go to the front desk. I’ve asked the front desk folks, and they always say “our property has a policy to not allow mobile check-in”… I guess Marriott allows this at the property’s discretion. One property said they don’t want the guest to get stuck with full charges if they end up having travel issues and mobile checked-in the day before."

"I have been a Platinum for a few years (which implies I frequent Marriott properties on a regular basis) and up until tonight was NEVER asked for any id to justify a corporate rate or discount (I legitimately use a few corporate rates I am entitled to and AAA rates)"