That is the part I'm confused about. I hear everyone say they have a virtual office in Delware with physical location in Estonia and I also hear people say they are based in New York so i'm not sure the specifics I would need to use for a small claims case.
Their listed PMB address is their registered agent for service. It belongs to Delaware Business Incorporators, Inc.
https://www.delawarebusinessincorporators.com/You should be able to legally serve them there, because unlike PO boxes, there is someone present during business hours to sign for the papers.
I am A US resident so I will have no problem with filing the claim just want to make sure I do everything correctly. Any other tips for the actual claim?
Not really. I don't know the exact type of claim or how the process works, especially in Delaware. I assume you need to be physically present on the trial date. You need to serve them at a known, registered physical address otherwise your case will thrown out for improper service. That's why I wouldn't worry about New York or Estonia, etc.
Other possible registered addresses based on their filings:
PAXFUL, INC.
C/O BUSINESS FILINGS INCORPORATED
108 WEST 13TH ST
WILMINGTON, DE 19801
PAXFUL USA, INC.
C/O CAPITOL SERVICES, INC.
1675 S STATE ST STE B
DOVER, DE 19901
PAXFUL HOLDINGS, INC.
C/O CAPITOL SERVICES, INC.
1675 S STATE ST STE B
DOVER, DE 19901