Is it possible?

Is it possible to trade items between a pre-searing and post-searing char?

While it is possible to trade items between characters using the Xunlai storage vault, the vault service is not available in presearing. Also, once a character leaves presearing there's no returning.

So at present, it isn't possible to trade items between a presearing character and a postsearing character.

Yep, besides a "bug" about a year and a half ago, you can't transfer pre and post items.

Neo, don't forget the recent hack that allowed presear characters onto the battle isles.

In simplest terms however, it's not SUPPOSED to be possible and if someone figures out a way to do it, it's a bug, glitch etc and should be reported to ANet support.

Not supposed to, can also mean exploit to Anet, purposely exploiting the game can result in action against your account.

That means a ban :O

Anet isn't doing anything aboout the GH glitch items. But they are banning people who have tomes or any thing that wasn't available at the time of the bug. Those people hacked they're way into getting that stuff, so that =ban

http://presearing.com You can read about it in the presearing forums.