Method for providing occupant information for a safety device for a vehicle, the method comprising the following steps: reading in image data representing an occupant of the vehicle via an interface of a determining device to an image capturing device of the vehicle, wherein the image data comprise feature parameters of a recording of the occupant by means of the image capturing device; ascertaining plausibility check data using a recording of a person by means of a mobile device, wherein the recording representing the person is normalized to form a normalized recording using the characteristic of the image capturing device by virtue of the fact that the recording of the mobile device is subjected to a transformation which knows a characteristic of a camera of the mobile device and converts it to the image capturing device, wherein the plausibility check data are ascertained as feature parameters of the normalized recording from which the face of the occupant cannot be reconstructed, wherein the normalized recording is subjected to a feature calculation by means of an image processing algorithm of the mobile device in order to obtain the feature parameters of the normalized recording; reading in the plausibility check data representing the person via an interface of the determining device; determining occupant data characterizing the occupant by means of the determining device, after a successful plausibility check of the image data by means of the plausibility check data, wherein the plausibility check will be successful if a result of a comparison of the feature parameters of the recording with the feature parameters of the plausibility check data indicates that the person corresponds to the occupant; and requesting further plausibility check data representing a further person (108, 120) if, in the step of determining, the occupant data cannot be determined using the image data and the plausibility check data, and comprising a repeated step of determining the occupant data using the further plausibility check data; and providing the occupant data to an interface to the safety device for the vehicle. reading in image data representing an occupant of the vehicle via an interface of a determining device to an image capturing device of the vehicle, wherein the image data comprise feature parameters of a recording of the occupant by means of the image capturing device; ascertaining plausibility check data using a recording of a person by means of a mobile device, wherein the recording representing the person is normalized to form a normalized recording using the characteristic of the image capturing device by virtue of the fact that the recording of the mobile device is subjected to a transformation which knows a characteristic of a camera of the mobile device and converts it to the image capturing device, wherein the plausibility check data are ascertained as feature parameters of the normalized recording from which the face of the occupant cannot be reconstructed, wherein the normalized recording is subjected to a feature calculation by means of an image processing algorithm of the mobile device in order to obtain the feature parameters of the normalized recording; reading in the plausibility check data representing the person via an interface of the determining device; determining occupant data characterizing the occupant by means of the determining device, after a successful plausibility check of the image data by means of the plausibility check data, wherein the plausibility check will be successful if a result of a comparison of the feature parameters of the recording with the feature parameters of the plausibility check data indicates that the person corresponds to the occupant; and requesting further plausibility check data representing a further person (108, 120) if, in the step of determining, the occupant data cannot be determined using the image data and the plausibility check data, and comprising a repeated step of determining the occupant data using the further plausibility check data; and providing the occupant data to an interface to the safety device for the vehicle.