My son (now aged 19) has lived with my ex-DH for 2 years. (His choice) All was well whilst DS was still at school - exDH was able to claim tax credits, child benefit, housing and council tax benefits ( he's retired). When DS left school and started working ( part time, around 15-20 hours a week) they (ex-DH and DS) asked if he could move back in with me as exDH would no longer be able to claim benefits for housing costs and DS couldn't claim as he was a) too young b) living with his Father. Naturally I agreed, DS 'moved back in', changed his driving licence and passport details to my address. After 2 nights he went to stay with his gf and for the last year has flitted between gf's house and his Father's but not stayed here. DS's gf went to Uni in September so DS has since been living full time with his Dad. He has not stayed here once. Now the AIBU - a few months ago I had a form to fill in for the electoral roll. I didn't include my son on it. Some weeks later his Father texted me to say he had been in touch with the local council to tell them DS lived with me and a letter addressed to DS would arrive for him to register to vote. This letter has now arrived. 1) Can my DS register to vote using my address when he lives somewhere else? 2) Is my ex-DH being a CF using me to claim benefits fraudulently? I don't want to play any part in enabling him to do this ( for background, there is a history of domestic abuse) but don't want my DS to be affected by having to leave his Father's as he's happy enough living there.