There are multiple definitions - click on the translation that matches your context.

由公证人经办或处理的

形容词

full

notarial

adjective

Definitions of notarial

relating to a notary public (=a person authorized by the state to conduct limited legal functions, such as authenticating signatures and certifying documents)

WITNESS my hand and notarial seal this the 27th day of JANUARY, 2014.