|I agree with Janet and Mike.|
And this is usually with GNW whether the docs are loan or just "general".
I always staple the signature page with the cert if they are separate. And many times, signer does not want it attached, but I let them know: (1) it's the law, and (2) as long as my staple imprint is on the signature page, what they do after the fact is of no concern to me. I have no control over that.