Harbhajan was signed up by Surrey at the end of last season but his appearance for the club was delayed over the doubts over his bowling action.
That hurdle was removed when International Cricket Council (ICC) gave a conditional go ahead, that is, allowing him to bowl provided he stuck to his action that was tested at University of Western Australia laboratory in February early this year.
The Punjab off-spinner will be the second overseas player at the Brit Oval, Kennington, with Pakistan's Azhar Mahmood.
Surrey, having secured the bowler's services till the end of July, hope he would be available again later in the season should there be a change in the dates of India's tour of Zimbabwe in August.
Surrey coach Steve Rixon was confident the reporting of his action would not affect Harbhajan's performance.
"He's a world class bowler and I have no doubt that he'll make a huge difference to our side," Rixon said in a statement on Surrey's website.
"He'll be able to finish off sides which is something we have struggled with in the past, not to mention adding another dimension to our attack."