Report the rent that can be proven by bank deposit records that was received. That's it. For months not paid, it's less than $200 (in the state of FL at least) to file for eviction and back rent. Just make sure you include your court fees in the filing. I've had to evict more than once, and never used a lawyer. Generally, when the tenant gets the first summons, they either move or pay up. Only once have I actually had to go to small claims court, and the tenant lost of course.
