For a while, 34% of legitimate passports were issued with invalid signatures due to various mistakes during manufacturing. This made signature verification practically useless at the border as many legitimate passports would fail validation completely. I wonder if it has gotten any better since 2017.<p><a href="https://www.icao.int/Meetings/TRIP-HongKong-2017/Documents/TRIP2017.HongKong.Rajesh(edited).pdf" rel="nofollow">https://www.icao.int/Meetings/TRIP-HongKong-2017/Documents/T...</a>