The most common legal path to immigration is to apply for a visa, or legal permission to live and work in a foreign country. Depending on the country and the individual’s circumstances, there are several types of visas that can be applied for, including family unification, employment-based, refugee, or student visas. Immigrants must typically meet certain requirements to be eligible for a visa, including proof of financial stability, education, and health. Additionally, many countries have quotas for how many immigrants they accept each year.