Tried, couldn't reproduce it. I don't understand how being in a different realm would make a difference. If it did, people could turn in a quest 2 times to get legendary items, like the legendary cape, for example.
I get what you're saying, but that doesn't seem possible. unless there's like a 1/1000000 chance that you can click the NPC after turning in the quest, as you shift realms, before the "?" disappears from their head and manage to turn it in as you shift into your realm again, and do so with the perfect amount of lag. It's like getting all the planets to align at the same exact time.
Take a ss of your character with 6 seals?
You said you had 0, so first step is to show you have 6 now, as you really have no other proof that it works.
Works on EU with Netlimiter (3rd Party Tool)
Here man why would i lie about it
http://imageshack.com/a/img11/1034/g3so.png
OP didn't even try it himself as that's NOT The method to do it.
Only a handful of people know it, and here's the result of someone like me doing it ;>
http://img33.imageshack.us/img33/2725/jgf0.png