Says Jordan’s personal check — signed by His Airness — made out to Donald Trump’s Indiana casino during the ’97-’98 NBA season … just hit the auction block.

The one-of-a-kind check is dated “Feb. 16, 1998” … and is made out to “TRUMP INDIANA, INC.” — Trump’s now-closed riverboat casino in Gary, Indiana — for 15,000 bucks.

MJ’s very recognizable autograph is on the checks signature line … above the font “JORDAN, MICHAEL J”