US Passport Renewals is becoming more popular because the ease of getting a US Passport has been made simpler by the increase in the number of tourists visiting the United States. A passport is necessary to enter the United States, and is granted at no cost in the event the applicant proves to be a US citizen and is a male over 18 years old. There are no age limits on obtaining a US Passport. The most usual reasons for US Passport renewals would be to replace missing Passports, renew an present Passport or document a change of residence.