WARNING upon completing this process your asset will be bugged our and you wont be able to use/trade/sell it
So i came to this bug while messing around with professions
1. start doing some task
2. send asset witch is in use to yourself or to some character of your above level 15
3. cancel your task(game says that all resources will be refunded to you but it wont refund assets)
4. take your asset from mail
Gratz now you have asset witch cant be sold/traded/used your profession wont even recognize it i its in your bag.
Seems useless but i hope some one wil find use to this and if so share with us.