Apollo Nida -- husband of "Real Housewives of Atlanta" star Phaedra Parks -- has pleaded guilty in a massive money fraud scheme ... after allegedly stealing the identities of more than 50 people and laundering more than $2.3 million.
According to the US Attorneys' office, Feds pounced on Nida last year after he and a group of co-conspirators cashed tons of stolen U.S. Treasury checks, and checks from the Delta Airlines pension fund ... then laundered the money through bank accounts in the names of people whose IDs he also stole.
Feds claim Nida bilked even more cash by filing fake tax returns and obtaining bank loans against cars he didn't own.
He pled guilty Tuesday to conspiracy to commit mail, wire, and bank fraud. He'll be sentenced at a later date.