Passport photo online - Why a neutral facial expression is p

[РоманЛевин]

Although a natural smile is allowed, why do professional Passport photo online services often recommend maintaining a neutral facial expression as the safest choice for a USA passport submission?

[МарияХаммонд]

A completely neutral expression (mouth closed, face relaxed) is recommended by Passport photo online services for the USA because it provides the most consistent and reliable geometric data for the facial recognition software. Any smile, even natural, introduces slight distortion around the eyes and cheeks, increasing the marginal risk of rejection. Choose the safest expression for submission: visit https://passport-photos.net/.