My childrens bio dad who has not been interested for 10 years has sent me a solicitors letter, through my child not posted, saying he wants legal rights over them (he refused to sign birth certificates) there are several mistakes in the letter including spellings of names any advice? He also called social services on me 3 times who did come out, hats off to them, but no case to answer on any visit. He has no job but I do so he knows I cant afford legal advice but does he get legal aid? I'm just very upset