America
Puerto Rico
Requirements
Passport valid according to US rules for visa or entry (generally with validity longer than the length of stay).
Proof of remote employment or foreign freelance activity (may be useful to show that you will not work locally without authorization).
Meet the conditions of the US visa that allows you to enter and stay (length of stay, permitted activities, etc.).
Do not work for employers or clients within Puerto Rico without the appropriate work visa (so as not to violate the visa condition).