Passport and driving license are vitally important to every Argonathian. They allow you to purchase houses, businesses, and vehicles in the server. Both of these can be obtained by taking an exam at San Fierro City Hall. The exam tests your knowledge of the server. If you pass it, you will obtain the documents. If you fail, you can try again after a certain time period.
Be advised that both license and passport can be revoked from you for reasons such as court punishment and misbehaviour. If your documents are revoked, you are subject to losing all the properties and/or vehicles you own.