co-sponsors letter saying that your parents are inviting your wife to stay in their place. there is no form for co-sponsor just write a letter and provide supporting documents such as extract copy of the title if it is freehold or mortgage documents... i can send you or post here sample of co-sponsorshop letter if you want as we did the same thing (i will be staying on my father-in laws house, we dont have our own place but thanks God visa granted)![]()