In general, no — most companies do not check or verify your age. However, assuming that the company will not check up on you is not recommended. Most companies will have age requirements listed in the terms of service that you must agree to. If you misrepresent your age, you could be violating the terms of service. If the company finds out you're below their minimum age, they could withhold a balance that you’ve earned or close your account (and you may not be able to use that platform in the future). Overall, it’s not worth the risk and you’re better off considering only opportunities that are available to people your age.