In order to maximize your chances of success, ensure that every photo you submit is top quality. Quality is the most important criteria on every stock photography site. Do not scale down your photos (making them into a smaller resolution) or scale them up (making them a higher resolution).
Be extremely careful how you modify your images in digital photo editors such as Photoshop. Don’t bother to submit over or under exposed images. Also avoid the following photographic errors if you can: lens flare, noise, high contrast and blurs. We normally reject these types of photos.
You should not, under any circumstances, upload photos which are not yours. Also, avoid submitting third party logos and trademarks of any kind. Avoid taking photos of military buildings as well as buildings and objects where the trademark is visible (e.g. photos of the Apple Store).