A321
Flight Crew Air Transport Pilot (ATP); Flight Crew Commercial; Flight Crew Instrument; Flight Crew Multiengine
Communication Breakdown
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Human Factors; Procedure
We were ferrying an A321 to ZZZ with 4 empty cabin portable oxygen bottles in the cargo compartment. I called Dispatch and Maintenance Control and inquired if we needed a maintenance waiver to carry them. They informed me that since they were empty it was not needed.
The day after a medical emergency caused us to land at ZZZ1; we ferried a flight back to ZZZ. We were unaware that any HAZMAT was located in the cargo and no documents were provided.[Company] does not service this airport; so we had no ground support to notify or provide us paperwork of the situation. It's hard to pinpoint a solution in this extraordinary event; since there was little to no service at this airport.
A321 flight crew reported a communication breakdown between flight crew and Dispatch regarding transport of Hazmat material on ferry flight.