"BellSouth's Marriott code 256810 may still be active in Marriott's GDS system despite AT&T's acquisition in 2006. Codes from legacy companies often persist. No verification incidents documented. AT&T (which absorbed BellSouth) has a separate Marriott code (ATT) rated Low. Legacy codes from acquired companies are among the lowest-risk as they are rarely flagged for active monitoring."

"I've never been asked, but last night I stayed at a SHS I had only stayed at once before and the clerk casually asked "what company are you with" and she was writing out my card. I suspect she was comparing to the rate plan I used for the reservation."

"I'm guessing so, but I'm not a Marriott employee. Also, to answer some of the other questions floating around here, I have never been asked to produce my work ID when checking into the hotel that I booked using a corporate rate. I travel half a dozen times a year."