A computer-implemented method, comprising: at a server system including one or more processors and memory storing one or more programs for execution by the one or more processors: receiving first authentication information for a first authentication request, wherein the first authentication information includes a first image that corresponds to a first identification document; determining, from a validation system, first validation information corresponding to the first image, wherein the first validation information includes a first authentication decision associated with the first image; storing, by data storage of a machine learning system, the first image and the first validation information corresponding to the first image; updating an authentication model of the machine learning system based on the stored first image and the stored first validation information corresponding to the first image; image; characterized in that the method further comprises: receiving a deletion request from a user device, the deletion request designating the first image; in response to receiving the deletion request designating the first image, creating inverse validation information for the first image, the inverse validation information including a second authentication decision associated with the first image, wherein the second authentication decision contradicts the first authentication decision; updating the authentication model of the machine learning system based on the stored first image and the inverse validation information; and subsequent to updating the authentication model of the machine learning system based on the stored first image and the inverse validation information, deleting the first image from the data storage of the machine learning system. receiving first authentication information for a first authentication request, wherein the first authentication information includes a first image that corresponds to a first identification document; determining, from a validation system, first validation information corresponding to the first image, wherein the first validation information includes a first authentication decision associated with the first image; storing, by data storage of a machine learning system, the first image and the first validation information corresponding to the first image; updating an authentication model of the machine learning system based on the stored first image and the stored first validation information corresponding to the first image; image; characterized in that the method further comprises: receiving a deletion request from a user device, the deletion request designating the first image; in response to receiving the deletion request designating the first image, creating inverse validation information for the first image, the inverse validation information including a second authentication decision associated with the first image, wherein the second authentication decision contradicts the first authentication decision; updating the authentication model of the machine learning system based on the stored first image and the inverse validation information; and subsequent to updating the authentication model of the machine learning system based on the stored first image and the inverse validation information, deleting the first image from the data storage of the machine learning system. receiving a deletion request from a user device, the deletion request designating the first image; in response to receiving the deletion request designating the first image, creating inverse validation information for the first image, the inverse validation information including a second authentication decision associated with the first image, wherein the second authentication decision contradicts the first authentication decision; updating the authentication model of the machine learning system based on the stored first image and the inverse validation information; and subsequent to updating the authentication model of the machine learning system based on the stored first image and the inverse validation information, deleting the first image from the data storage of the machine learning system.