After finally having an offer for our ppi claim with firstplus, today we recieved a letter saying that the signature on our acceptance forms do not match their records, it is my husbands signature that has changed over time, they have asked for proof of id saying passports and marriage certificate which i can send, however on both of these they are still different to his current one, we have got to resign the acceptance form, is this normal as they are starting to make me feel as if i have done it or something like that, is this normal practise and can they refuse to send our cheques if they still not satisfied?