Yes they are tradeable
they have to be kept in bank or aeria will not acknowledge them as legit items just like character revivals UNLESS you have a SS of the persons Purchase history
easiest and fastest way to do this is have a friend send a ticket for you
If i'm not mistaken, they both have to send a ticket for verification and yes please keep the Item Recovery in your bank. Just tell the GM's exactly where it is in your bank.