Dispute

We know that regardless of who wins the November 4th POTUS election, the other side will dispute the vote.  So, in a rational world, a protocol for disputing and validating the vote would be ironed out in advance.  In addition, the steps in the protocol would be communicated and publicized so that all know what to expect. Each state would need to do this, as election procedures are the legal responsibility of the state - not the federal government.