The INCAD (Incapacitated Passengers Handling Advice) is a document that ticket offices and agencies, etc. have to fill in when they sell a ticket to an incapacitated passenger who needs additional means (stretcher or oxygen, ambulance at origin or destination, etc.) or whose health could be affected during the flight, seriously affect the other passengers, or put the security of the flight at risk. This document contains relevant information about the passenger's condition and is the document the Iberia Medical Service uses to issue clearance to fly. It states the passenger's requirements (such as whether the presence of a companion or healthcare professional is required).