If you have a history of playing together and can prove it, it is unlikely you will get pinched.
Even if you get hit in a blanket wave by mistake, it would be easy to prove your relationship and reasoning behind giving him the items while you are not playing.
For some reason, I get the impression that your level 25 nercro and sub-12 alts don't have many thousands of plat worth of gear to be RMTing anyways.
No one will think that you are RMTing your bone chips.
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