There are very very very few things that you could "correct" about a problem document.  They typically include putting a "cover page" on a doc for the county to have room to put their stamp, rearranging the pages in numeric order, stapling or clipping pages together, rearranging pages oriented wrong (backward, sideways, upside down, etc), certifying an unfilmable notary seal, and any other non-material changes or statutorily proscribed changes only.

  If you are taking it upon yourself to materially alter any document which has been executed by  others and finalized under notary seal, you sure as hell better have great liability insurance and even then, that could never cover you against the possibility of criminal culpability if anyone ever investigates such matters.

  The duty of the notary to correct any of their own errors or omissions is clear, as is the duty of the signing parties to modify their own documents to which they've signed.

  The fact that you would seek to charge an extra fee for any of the additional services proscribed in paragraph one, is kind of weird, having been in the recording business for 25 years in the SF-Bay Area, which is quite a busy hub of activity.  I certainly would call any of my compeitiors on illegal practices if I had any idea that they were doing such things outside of the law, as this would be an unfair business practice against my interests, and a potentially fraudulent one agasint the public records.  My interests as both a business owner and as a taxpaying member of the public would potentially be subverted by such activity.

  How many cert. seals and cover pages are we talking here?