Quote Originally Posted by Risvertasashi View Post
You can actually "request meld" from someone, a system which lets them attach materia to an item of yours without handing anything over. I don't remember exactly where this is but it might be a right click option?
Yes. You can right click someone and choose the "request meld" option. The option will be grayed out unless that player is in the correct class that has melding abilities. This method is safe because it does not require actually trading the materias and weapon first. But you still have to provide the weapon, both materias and the catalyst.