Vehicle occupant verification methods and systems

A vehicle comprising:

• a detection sensor configured to detect whether a vehicle occupant is present inside a vehicle;
• and
• a controller configured to:
• check whether the vehicle occupant is inside the vehicle, based on a first preset condition, comprising checking a presence of the vehicle occupant inside the vehicle through a detection sensor, when:
• a current driver of the vehicle matches an existing driver;
• and
• a driving pattern of the current driver matches a driving pattern of the existing driver;
• and
• check whether the vehicle occupant is inside the vehicle based on a second condition, comprising checking a presence of the vehicle occupant inside the vehicle through a detection sensor, when:
• the current driver of the vehicle does not match the existing driver;
• or
• the driving pattern of the current driver does not match the driving pattern of the existing driver,
• wherein a sensitivity of the detection sensor in the second condition is higher than a sensitivity of the detection sensor in the first condition.