FedEx prides itself on reliability. But a mistaken delivery tipped off police to a 200-pound shipment of marijuana that someone tried to send from Pembroke Pines, Florida to Baltimore via the shipping company.

Police tell The (Baltimore) Sun they learned about the shipment when it was delivered Tuesday to the wrong resident.

Authorities posed as FedEx employees and arrested the shipment’s intended recipient, 30-year-old Richard Gwatidzo.

Officials say he was charged Thursday with possession of a large quantity of a controlled dangerous substance with intent to distribute along with other drug related charges.

Police say they also seized eight other FedEx boxes with nearly 400 pounds of the drug.

Authorities are trying to determine the sender’s identity.