The tracking devices are under the band of one stack of bills. Taking in stacks of bills means running them through a counting machine before accepting them. The trackers would be found right then.
Transferring money isn't done on trust, the amounts in and out must match and nobody would just take a customer's word for the count.
Transferring money isn't done on trust, the amounts in and out must match and nobody would just take a customer's word for the count.