"Toshiba's Marriott code TOS is for the Japanese electronics and infrastructure company. Toshiba has significant US operations in multiple sectors (memory, power systems, elevators). hotelcorporatecodes.com lists TOS in the 'Sometimes' verification tier. Japanese company codes at US Marriott properties carry standard tech-sector Medium risk; in Japan and Asia, Marriott properties are more verification-active. No specific TOS denial documented in public forums. Standard Medium calibration applies."

"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."

"I work for the front desk, at a Marriott, & have for the last 8 years .... So when it comes to room upgrades; it goes based on AVAILABILITY... sometimes no matter the tier, if we have it available - I will upgrade the guest. Now of course, higher tiered members get dibs on the upgrades first but after we go through the higher tiered members, Ambassador, Titanium, Platinum - then we go through the other ones. I cannot express this enough : BEING NICE & POLITE AT THE DESK GOES A LONG WA"