Sir Alex Ferguson has brought the 22-year-old goalkeeper back to Old Trafford after struggling to win a regular role, but he has "very fond memories" of the Championship side
Amos made 17 appearances for Steve Bruce's side after joining last summer on a season-long loan, but has not featured in the Championship since November 17 with David Stockdale (now back at Fulham following Mark Schwarzer's injury) and Eldin Jakupovic the preferred goalkeepers.
While the 22-year-old has returned to Old Trafford after a disappointing end to the deal, he thanked the club and revealed he will take away "very fond memories" from his time with the Tigers.
Amos said on Twitter: "Just heard United have officially recalled me. I thoroughly enjoyed my time there whilst playin [sic], a great bunch of lads and a club worthy…Of where they are.
"Thanks to them for the opportunity and to everyone who supported me and the lads. I'll hold very fond memories."
The club also thanked the player over from their official Twitter account, stating: "On-loan GK Ben Amos has been recalled by Man Utd. We'd like to thank him for his efforts, and we wish him all the best for the future."
If Amos remains at United for the second half of the season, he will be competing for a spot alongside David de Gea, Anders Lindegaard and Sam Johnstone.
Amos has had loan spells at Peterborough United, Oldham and Molde, and signed a new deal in May 2012 to keep him at Old Trafford until 2015.