Systems and methods are disclosed for using object recognition/verification and weight information to confirm accuracy of an optical code scan, or to provide an affirmative recognition where no scan was made. One example checkout system includes: an optical code scanner configured to generate a product identifier; at least one camera for capturing one or more images of an item; a database of features and images of known objects; an image processor configured to: extract geometric point features from the images; identify matches between extracted geometric point features and features of known objects; generate a geometric transform between extracted geometric point features and features of known objects for a subset of known objects corresponding to matches; and identify one of the known objects based on a best match of the geometric transform; and a transaction processor configured to execute a set of actions if the identified object is different than the product identifier.