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Get the Facts: Election night results are not official results. These sites may experience outages due to a variety of issues including too many people trying to view the site or cyberattacks. Such disruptions do not impact the integrity of votes or the official certified results. Election results made available on election night are always unofficial. Official results are rigorously canvassed (reviewed), and certified by local and state election officials. Most states have requirements for post-election audits as well.
https://www.cisa.gov/rumorcontrol
Committing fraud through photocopied or home-printed ballots would be highly difficult to do successfully. This is because each local election office has security measures in place to detect such malicious activity. While the specific measures vary, in accordance with state and local election laws and practices, such security measures include signature matching, information checks, barcodes, watermarks, and precise paper weights.
https://www.cisa.gov/rumorcontrol
>That means whatever went on behind the scenes might not be known until Dec 14th
Which also happens to be the date that the Electoral College casts its votes.