Hello! My son Sammy just turned 18 in July, and he's preparing to fill out his transcripts for university, but yet again he's being difficult! His given name is Samuel, but his father and I have called him "Sammy" since he was 2, and I'm just now paying the price for it. He's a wonderful boy and I'm so proud of him, but he refuses to write down his birth name on documents, name tags, or any other things in the formal vein. He will only go by Sammy, and at first I didn't think anything of it, until my husband's sister pointed out on his 17th birthday that Sammy was an "immature name; he'll be looked down upon in formal settings if he refuses to be called Samuel". I don't really care what he chooses to be called, but she's got me wondering whether or not his nickname will rub people the wrong way :( any thoughts? Thanks!