While true, doing such background checks gets a lot easier with documentation like birth certificates. I assume a large fraction of people who have considered

While true, doing such background checks gets a lot easier with documentation like birth certificates. I assume a large fraction of people who have considered committing this kind of fraud, have decided against it because they realised it would be relatively easy to investigate. (And I expect that places with birth certificates also tend to have a more consistent presence of other kinds of records, and a higher law enforcement budget for investigating possible instances of fraud, when compared to places without birth certificates.)