H1 transfer doubt

[palle]

What if a person holding a H1 for Company A, applies for H1 transfer through Company B, and once the transfer is approved, he changes his mind and doesn't join this company B? and again he applied for transfer to Company C.

Now my question is:
1. Can he work for Company C?
2. to apply H1 transfer to Company C, can he submit Company A's documents (paystubs, etc)?

Please clarify.

Thanks in advance.