QUOTE(yumesora @ Nov 28 2014, 15:53)

So, does one return a Mag/Leg Item for exchange purpose only when the exchange is requested? Or can it be returned at any time and counted towards a later exchange request (no need to hold onto it*) - instead of being counted as donation?
in the moment you return the item, your name will be removed from track list. whether you decide to use the chance immediately or not it's up to you.
QUOTE(yumesora @ Nov 28 2014, 15:53)

What should the Subject line contain so not to confuse with Donation? Simply "Exchange" or "Exchange of Mag/Leg xxx" or ... ?
a generic 'return item' title or similar is enough, but do as you like. it's your (or better, generic requester) interest to make us know this
QUOTE(yumesora @ Nov 28 2014, 15:53)

* Is there a way to *lock* items to prevent accidental selling when using sell all button, other than putting it into a equipment set space or draft moogle mail attachment (only 1 item possible?)?
click the yellow lock as suggested by kumosu. from that moment onwards, the item won't be accessible from the equipment shop section (unless you de-lock it)