Every bill should be tracked.
When somebody cashes a check to get cash then usually that same person will spend that cash.
If somebody else spends that cash then they should probably report that as income. Or there may have be have been theft, drugs, etc.
If somebody shows up with a stolen bill then they should say why.
The JetScan iFX i100 processes 1,600 bills per minute
advanced counterfeit detection
serial number capture,
• Mixed bill processing:
• Serial number capture:
Capture full-size images of every bill at up to 1,200 bills per minute for a highly effective means of tracking currency.
• Counterfeit detection: The most advanced counterfeit detection in the industry, patented sensors and analytic software analyze each bill, catching counterfeits that others miss.
• Check scanning: Process checks at 400 documents per minute.