Since the reports of Russian interference in the 2016 United States General Election, the security of voting processes has received increased attention from both state and federal authorities. The declaration by the U.S. Department of Homeland Security in January 2017 that election systems be classified as the seventeenth component of critical infrastructure is just the beginning of a need for more secure voting processes. More recently, the COVID-19 pandemic and the 2020 U.S. General Election has placed greater emphasis specifically on mail-based voting processes for electoral systems. The objective of this research is to provide greater insight into potential threats to mail-based voting processes.