Witnesses:

If your document requires witnesses in addition to the notary, you are responsible for providing these witnesses.  Consular staff cannot serve as witnesses.  Witnesses cannot be a spouse or a relative, and each witness will need photo identification.  This is particularly important with regard to last wills and testaments. 

Signing on behalf of a company or corporation:

If you need to execute a notary service on behalf of a company/corporation, you will need to provide evidence that you have some kind of role in that company/corporation:  e.g., CEO, manager, owner, or member.  You may present a combination of documents, such as corporate letterhead, business cards, legal papers, articles of incorporation, partnership agreements, letters of guardianship or administration, or your company’s tax returns.