This info would be useful for my Beginner Giveaway. I know that the Staff can tell so do I need to PM them to check for me?

this is almost impossible.try to chek they're ingame activity coz new peeps go ingame alot

The only way you can do this is by looking at one's transaction history. Look at first pages. If there are some transfers, decapprize wins or duels what seem fishy on a low belt then it's deffinately an alt ;) Or even a low belt wining many tourneys...
Other then that only gm can check by ip

yea like insanity said, check his transaction history or another thing is what ive heard you can do is look at there ip or something

The GM's have powers to view IP adresses, which will allow them to see if multiple users have the same IP. aka Alts.

The only way we have, is transaction history

You can't completely tell because the whole ''neighbor, friend or sibling'' card will show

the dms can see their internet service or how its called, if two accounts use the same internet thats what they call alt