Cash is commonly banned by most logistics companies. As it is openly stated that it will not be carried by FedEx, it’s no stretch that the police will consider it contraband.
Source: I work for a competing company that also will not ship cash. Any of our employees will tell you no. Ship cash at your own risk.
It is against FedEx policy. These are terms you would agree to if signing for a shipment.
https://lemmy.world/comment/12402455