Endorsement is the process of transferring interest in a negotiable instrument by signing the back. The endorser signs their name on the back to transfer rights to the endorsee. An endorsement can be blank, specifying just the endorsee's name, or it can be restrictive, conditional, or sans recourse to limit the endorser's liability. The various types of endorsements include general, special, restrictive, sans recourse, sans frais, partial, conditional, and facultative.