I received diamond status from matching my Hyatt status back in Dec. 2015 that expired March 2017. I haven't had an opportunity to record a single stay up until this coming summer. I called CS and I just asked nicely if they would be willing to provide me status for my upcoming trip as a courtesy and they upgraded my status to diamond from silver exp. march 2019. I did not need nor was I asked if I hold any status with any other programs.
Anyone else have this experience?