A photo processing service is used for two main reasons. The first is to verify age and identity. The first is that visa application requirements can be very time consuming and difficult to comply with. Even if you've organized everything correctly - gone through the proper channels, filled out the paperwork properly, etc. - you may still find that you still need to submit an application that can take days or weeks to process. Automated systems can quickly and efficiently process large numbers of visa photos, so you can be sure that your application is accurate and on time.