Hello I have a few questions about invitation envelopes. 1. The proper thing to do is hand-write all of the names/addresses on the invite envelope, right? 2. Does the return address have to he hand written or can that be a label? 3. Can I put "& Guest" on the invitations for single people that don't have a serious s/o but are still allowed to bring a guest? Or should I find out who they're bringing and then write that persons name? Thanks very much!