dupe on 3.0.3 ?

[crocos]

hey, my friend has duping Emblems of Valor on funserver. He had 2x Emblem of Valors and he have now 500 emblems :O . I dont know how he do it but he make relog every yhmm 5 secs.So : log, relog, log, relog etc. and dupe?
i think, he is using a metodh from...2.4.3 with brown 10 slot bag. I try that method and it doesnt work for me...maybe i did make everything bad?? Method with wrapping papper doesnt work too, because i cant use that paper on Soulbound items or stackable items. Can any1 example me that method with "10 slot bag and wpe wilter" or other method?