Hello to all

[Mjolnir30]

Hello.
I am from Croatia,and i would like to come at some of your Ft competitions.
So im asking is it possible,do i need invitation letter,or i just come?
Can i pay competition price on euros or forints?
What is the time line to check in for competiton,i must do it in advance,or at the day when competition is?
Thank you.