Sancho finally completed a £73m move to United on Friday afternoon.
His behaviour and good manners in the build up to the big-money switch appear to have had a lasting effect on Dortmund, who heaped praise on the winger for his professionalism throughout.
"It was Jadon's express desire to return to his home country and the Premier League, and his behaviour was absolutely flawless at all times," Hans-Joachim Watzke, CEO of Borussia Dortmund, told the club's official website. "I would therefore like to thank him on behalf of everyone at BVB."
The German club's sporting director, Michael Zorc, added: "In his four years with us, Jadon has developed greatly. Towards the end of last season in particular, he contributed to the team's success with important goals and assists.
"We would like to thank him for his commitment and wish him the best for his future career."
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