Organized coercion or buying of votes can be detected based upon information associated with the return of vote by mail ballots, and more specifically an induction parameter related to the location where and time at which vote by mail ballots are inducted into a carrier system for return to the election officials. Upon receipt of the vote by mail ballots by election officials, at least one induction parameter is obtained from the envelope. The data that is collected can be analyzed to detect situations that indicate potential coercion or vote buying by comparing it with expected induction parameters. If a situation that indicates potential coercion or vote buying is detected, those voters whose ballots are involved can be contacted by the election officials, before the votes are tallied, to ensure that the specific voters have not been coerced or sold their vote.