evidence - an indication that makes something evident; "his trembling was evidence of his fear"

good authority - testimony by someone who should know; "I have it on good authority"

testament - strong evidence for something; "his easy victory was a testament to his skill"

commendation, approval - a message expressing a favorable opinion; "words of approval seldom passed his lips"

congratulations, kudos, praise - an expression of approval and commendation; "he always appreciated praise for his work"

character reference, reference, character - a formal recommendation by a former employer to a potential future employer describing the person's qualifications and dependability; "requests for character references are all to often answered evasively"

puff - exaggerated praise (as for promotional purposes)