<prompt> Human: So my grandfather, who I have a tenuous relationship with, wants to set up a 529 for my son. Apparently, because my son is a minor, not only is his ssn necessary, but mine is as well. This may prove to be a silly question, but how should I give my grandfather that info? He has suggested I mail the info to him, but my wife is a little leery rightly so.  <response>: You can set one up, then have your family contribute to it as they wish. 