All that needs to be agreed between the two parties are personal terms and a medical to be carried out to ensure Valdes will play in the top flight next season.
The former Barcelona goalkeeper endured a dreadful time at Manchester United before his contract expired this summer.
He fell out with Louis van Gaal having refused to train with the reserves before getting into a very public and unsavoury row with the former United boss. He was not allowed to wear the United suit while watching from the stands and he took to Instagram to have a go at the Dutchman regarding respect.
Two appearances is all Valdes could muster up during his time at United, one as a substitute against Arsenal two seasons ago. He joined Standard Liege last season on loan for four months and helped the Belgian side win the Belgian Cup.
Valdes turned 34 at the start of this year and is well into the winter of his career but at Middlesborough might get the chance to compete for a starting position.
When United signed him, it looked like an excellent move and his fleeting appearances brought some good performances (and some bad ones). Unfortunately for him it never worked out yet he’s now got a second chance back in the Premier League.
It won’t come back to haunt United because we’ve still got David de Gea in goal but it will be interested to see how he gets on at the newly promoted side and I do wish him the best of luck.
Update: Valdes has now completed his move to Middlesbrough.
Very Proud to be part of @Boro
A new challenge for me from today! pic.twitter.com/zKapqxIbuN
— Victor Valdes (@1victorvaldes) July 7, 2016