The first condition that all online casinos have is that all players must be at least 18 years old. However, depending on the location, some casinos have a higher age limit of 21 years old. Another standard condition is that all players must register to the online casino and become a member.
Also, the player must be located in a state or city where the online casino is authorized to operate at the time when they want to claim the bonus. Other conditions may differ depending on the online casino.