"Alibaba's Marriott code A7A is for the Chinese e-commerce and technology giant. Alibaba employees primarily carry Chinese company-issued credentials which Western hotel front desk staff are less familiar with verifying. FlyerTalk's corporate code thread notes that Chinese tech company codes at US and European properties face a different verification challenge: staff may request proof but be unable to assess the validity of Chinese corporate ID cards. Marriott's rate desk has documented Alibaba as a monitored account given the company's rapid growth and high travel volume. High risk due to systematic verification challenges."

"Corporate code - never once and we’re in the 200+ night a year arena. Gov discount / AAA- always be prepared to show ID Edit: reading comments and I recalled the Ritz in Singapore asked - but we had a corporate package to receive. Also our rate was maybe $300 and the normal rate was about 3 x that so perhaps that’s a part of the equation. In any event if you don’t have ID just shoot them an email from your corporate address"

"I was asked for proof at a Courtyard in Cape Cod. They said badge or email verification was fine."