Can you notarize my letters and forms?

We are not lawyers, and the following should have not considered the legal advice.

From HUD’s FHEO 2020 (Guidance on Documenting an Individual’s Need for Assistance Animals in Housing)

Housing providers may not require a health care professional to use a specific form (including this document), to provide notarized statements, to make statements under penalty of perjury, or to provide an individual’s diagnosis or other detailed information about a person’s physical or mental impairments.