The US declared mail-in voting too fraud prone too, like in the late 1980's (It was probably much safer back then, but this was actually 2005), when Jimmy Carter was part of a group tasked with doing an risk assessment report on it.

Absentee voting is vulnerable to abuse in several ways, the Carter-Baker report stated, including that ballots sent to the wrong address could get intercepted, or citizens who vote at a home, nursing home or work might be subject to intimidation or pressure.

The report included tips to improve absentee voting security, such as prohibiting third-party groups, candidates or activists from handling ballots, strengthening the security of voter registration, and allowing observers to watch the processing of ballots. It included recommendations to improve absentee voting for persons with disabilities, as well as military and overseas votes.

It is like a playbook for all the shady shit that happened in 2020.