Question: Is it OK to have a third person to use my account?
No. You cannot have someone else but you to use your account. One account one customer. If we find out that a third person used your account, there is a possibility to suspend your account until we confirm that person's identification. Usually we instruct you to have that person register with our website. We do this just to avoid any trouble between us. We just want to ship packages safely to right person.