endorse

(verb) be behind; approve of. Synonyms: back, indorse, plump for, plunk for, support. Examples: "He plumped for the labor party." "I backed kennedy in 1960."

(verb) give support or one's approval to. Synonyms: second, back, indorse. Examples: "I'll second that motion." "I can't back this plan." "Endorse a new project."

(verb) guarantee as meeting a certain standard. Synonyms: certify, indorse. Examples: "Certified grade aaa meat."

(verb) sign as evidence of legal transfer. Synonyms: indorse. Examples: "Endorse cheques."