"No specific FlyerTalk or Reddit threads document AIG code verification incidents. The code follows Marriott's general corporate rate policy. AIG is a large but relatively low-profile financial services firm; its ticker-style code is widely circulated but US properties rarely enforce. International properties (especially Asia and Europe) are more likely to ask. No documented denied-rate cases found specifically for AIG."

"I think the last time I was asked for proof was in a JW Marriott in Beijing. I have never been asked in the US or Europe. Without a business card or ID, you may have an issue. Maybe you can contact the hotels in advance to see what info they need. I don’t remember if LinkedIn is available in China so I would talk to your Corp Travel team to see what they can do. Good news is that hotels are so much cheaper in China compared to ROW right now. ."

"AT&T is among the companies with the best Marriott negotiated rates. In the US, I've never been asked to show corporate ID. In Asia and Europe, I've been asked for corporate ID every single time. Since some companies don't put their name on badges for security reasons, the business card route is often tried first and usually accepted."