A permanent resident card number (noun) is a unique identification number assigned to individuals who have been granted permanent resident status in a country. For instance, in the United States, the permanent resident card number is printed on the front of the Green Card, which serves as proof of lawful permanent residence.
This number is crucial for various reasons. It allows permanent residents to work legally, travel internationally, and access certain government benefits. Historically, the permanent resident card number system was introduced to streamline the process of tracking and managing the growing number of immigrants in a country.