The relegated Dons hammered the finals nails into Bradford City's First Division coffin as the Bantams surrendered in front of their lowest League crowd of the season.
Bryan Robson's side needed a win to have any hope of salvation but his players were booed off at the interval after an inept first-half display.
After just four minutes Dons midfielder Malvin Kamara raced onto a simple throughball from Gary Smith and with City's defence flat-footed he stroked a right-foot shot past keeper Mark Paston from 12 yards.
Even with three men up front Bradford failed to test the visitors at the back and it was half an hour before keeper Scott Bevan was forced to save Robert Wolleaston's 25-yard drive.
Sixty seconds later the shell-shocked home fans were reeling from another defensive blunder which let in the impressive Smith.
Teenager Wade Small showed his pace out on the right but when his low cross came over City defender Jason Gavin failed to connect and Smith wriggled free to drill a low shot beyond Paston from eight yards.
Paston then did well to keep out a far post header from Wayne Gray but there was no disguising the home crowd's feelings when half time arrived.
Bradford striker Michael Branch wasted a good opening at the start of the second period and his miss looked even more costly when Paston handed the Dons a third four minutes later.
The Kiwi keeper fumbled Ben Harding's hanging cross and Gray tapped the loose ball into the empty net from inside the six-yard box.
Robson threw on three of his youngsters in a bid to salvage something from the game and 19-year-old Kevin Sanasy gave them a lift with his first goal for the club.
The teenager skilfully directed Danny Cadamarteri's left-wing cross beyond Bevan with his right boot from 14 yards and three minutes later Cadamarteri raised hopes of an unlikely comeback with a rasping 25-yard drive which beat Bevan all ends up.
Bevan then pushed another Cadamarteri effort wide but the Dons could have wrapped up the win in a tense finale.
Gray failed to beat Paston after he was put clear and in injury time substitute Dean Holdsworth saw his shot hit the foot of a post.