There is-but it's best to think of each as an additional 'layer' of certification. A signed statement of accuracy accompanies a certified translation. A notarized translation also contains that signed certificate, which will also have the notary seal after the certificate is signed in the presence of a notary public. The notary public affirms the signee's identity by affixing his signature and seals onto the certification page. The level of certification needed will depend on the requirements of the organization receiving the translated document.