A passport photo is a required documentation that accompanies an application for a passport or visa. The image plays a significant role in identifying the person applying for the document. There are several other synonyms for this document, such as ID photo, visa photo, identity photo, traveler photo, immigration photo, and travel document photo. No matter what name it goes by, it needs to comply with certain specifications such as size, background color, and other criteria to meet the passport or visa requirements of a particular country. So, whether it's a passport, visa, or any other travel documentation, a good photo is essential to complete the process.