Marking bills is a technique used by police to trace and identify money used in illegal activities. The serial numbers of the bills are recorded, and sometimes markings are made on the bank notes themselves (such as with a highlighter or other writing).
Marking bills is a technique used by police to trace and identify money used in illegal activities. The serial numbers of the bills are recorded, and sometimes markings are made on the bank notes themselves (such as with a highlighter or other writing).
Source: Wikipedia "Marked bill" · CC BY-SA 4.0
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