For how long the check lasted? He should have been prepared and take as many legal document with him as possible. There seems not much legal way he can go. The best choice is that he contact further with his employer.

check for almost one year.

I have no idea about the best solution.

I guess no one will wait for yu for one year.
He should keep contact with his company in the last year.

Now if the company won't take him again, H-1 visa means nothing to him.Even he gets into USA, the company won't pay him, he will still lose status?