Error messages can differ. What you do, will depend on the error message you receive.  If the check image did not capture properly, you will need to retake the photo. If you take too long to take a picture, you will receive a timeout error. If there is an error, you don’t understand and it is not related to an error in your mobile device operation, you may call Customer Service at 844-282-7372 Monday-Friday 9am-5pm (PT).