The Daily Star reports Shaw has 175,000 followers on Twitter and was last night messaged by one Manchester United fan called Sarah.
She wrote: "Hope you sign for mufc, we are all excited, good luck."
Users on the site can retweet or favourite to show approval of others' posts - and Shaw favourited the tweet.
However, the England ace has now backtracked by unfavouriting the message.
— ♡ (@hanahjayne_) April 16, 2014
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball