When several documents need to be prepared, photographs are easy to leave until the final stage. That can be frustrating if the selected image does not meet the required specifications and another one has to be prepared. Before submitting anything, travelers can check the Mexico SAE Photo Requirements and make sure their photograph follows the relevant guidelines. I’d handle the photo early and keep the final version saved somewhere accessible. It also helps to review the image at full size rather than assuming it looks fine because it appears acceptable on a phone screen. Taking care of this small task early leaves fewer things to worry about as departure gets closer.