Deviation / Discrepancy - Procedural Hazardous Material Violation
General Maintenance Action; General Work Refused
Human Factors; Procedure
Received 2 pieces of mail from the post office for flight and were immediately rejected back to the post office. The Lithium Battery label is clearly visible when it was tagged by the post office for [the air carrier] flight.
Airline Cargo Agent reported refusing incorrectly packaged USPS mail containing Lithium Ion batteries.