An incentive distribution system is used in distributing, tracking and redeeming product incentives offered by manufacturers and distributors of consumer goods through a financial institution. An application recovery system traps an exception which is dispatched to the top level exception handler before it reaches the top level exception handler. Each of the content items of the first group may be ranked based on information indicative of interactions from an activity database with the content items of the first group, the interactions being by at least a second user of the social network different than the first user. The method also comprises obtaining a second token, such as a public key, relating to the first token, decoding the encrypted digest using the second token, using a hash algorithm to create a digest of the document; and comparing the decrypted received digest with the newly created digest to determine the authenticity of the sender and the document. Mount bars are adjustable via a thumbscrew attached to the hinge tab saddle, whereby the lateral spacing of the loupes may be varied to thereby accommodate a range of interpupillary distances. Whether the rollers 9 are arranged in a parallel manner or in a cross manner, the roller retainer 11 is able to keep a constant position and thus the disposition of the roller retainer 11 is free from the influence of the direction the roller 9.