Every piece of mail must enter the system and be postmarked correctly. The US postal service certainly will not accept or deliver a piece of mail with a "Miami

Every piece of mail must enter the system and be postmarked correctly. The US postal service certainly will not accept or deliver a piece of mail with a "Miami Beach, FL" postmark addressed to the "Sacramento Board of Elections" if it comes in with a batch of Par Avion mail off a plane from Nigeria. You understand that the standard ML training data for OCR is from the US postal service, right? They've been routing mail electronically for decades. The election system in the US is ridiculously decentralized, which makes it really hard to commit large-scale voter fraud at the ballot level.