83 mail-in ballots sent to one Calif address

https://www.snopes.com/fact-check/83-mail-in-ballots-voter-fraud/

north carolina election thrown out for mail in ballot fraud Feb 2019

https://www.washingtonpost.com/politics/candidate-says-new-congressional-election-warranted-in-north-carolina/2019/02/21/acae4482-35e0-11e9-854a-7a14d7fec96a_story.html

WVa mail carrier charged in mail ballot fraud

May 2020

https://mailchi.mp/wvago/mail-carrier-charged-in-wva-voter-fraud-case

dem election judge in philly pleads guilt to stuffing ballot box

https://m.washingtontimes.com/news/2020/may/21/democratic-party-official-charged-stuffing-ballot-/

https://www.justice.gov/usao-edpa/pr/remarks-united-states-attorney-william-m-mcswain-regarding-charges-and-guilty-plea

oregon voters not mailed wrong ballot

https://www.politifact.com/article/2020/may/22/were-oregon-voters-mailed-wrong-ballots-primary-el/

Nov 2020 Nightmare--mail in ballots, lots disallowed, close election

https://www.wsj.com/articles/a-vote-by-mail-nightmare-11590189749

michigan city clerk (dem) charged with altering nearly 200 ballots

https://www.washingtontimes.com/news/2019/sep/24/sherikia-hawkins-southfield-city-clerk-charged-alt/

https://www.nationalreview.com/news/michigan-city-clerk-charged-with-altering-ballots-in-2018-midterms/