Avoiding Photo Rejection for USA Passport Online

What is the single most common reason USA passport photos are rejected when submitted online, and what is the best way I can prevent this common mistake?

The most common rejection reason is poor photo quality or incorrect sizing/biometric alignment (like shadows or wrong head-to-frame ratio), which fails the facial recognition check. The best way to prevent this is to use a specialized online service that automatically verifies and corrects all dimensions and lighting for guaranteed compliance. Get it right the first time: https://passport-photos.net/.