Overdue Rent can i speak to employer?

Good evening Everyone,

I have a tenant in a property that I have taken over the management of that is late again with his rent. He paid his first month upfront then his second and third months rent were late, I threatened a section 8 and his mum paid. His fourth months rent is late again, I have spoken with him several times and he has said that he hasnt been paid by his work and they are waiting for jobs to be paid out? Am I allowed to call his employer to check firstly that he still works there and secondly if thats the case and he hasnt been paid?

Thanks in advance