"Applied Materials' code APP appears in Marriott corporate code lists but has minimal community discussion. A FlyerTalk comment notes that some codes "are old and may not be valid, and some may require ID of some sort," and that rates are "widely offered and hard to check ID" particularly when extended to company retirees. Applied Materials is a major Silicon Valley semiconductor equipment company; Bay Area hotel density reduces the novelty of tech company codes in that market."

"My last couple of corporate RFID cards had no company name on them for security purposes. My current company doesn’t do business cards. I use my Bonvoy card for corporate travel to get the points. I’d have to write them an email standing at the check in desk, I guess."

"I don't do mobile check-in if I'm wanting to upgrade. I check the app before I go in to see if any suites are available to book during the duration of my stay. If there is I just say "Would it be possible to get upgraded to an available suite with my platinum benefit?". Of course this is typically at the hotel that I stay in about once a month for 3 day at a time for work. The front desk pretty much knows me and know that I am fairly low maintenance."