At the very least, Review all the votes for post office date stamps and signatures .Discard any vote that does not satisfy this criteria. Tally the remaining votes.
ForeignDeepState agrees! read it all at Time Mag (scroll down):
International observers slam Trump
International election observers from the Organization for Security and Co-operation in Europe, here at the Trump Administration’s invitation, slammed Trump for making “baseless allegations of systemic deficiencies … on election night” that “harm public trust in democratic institutions,” Michael Georg Link, special coordinator for the mission told reporters in Washington...
https://time.com/5906423/2020-election-results/