You could send them a friendly email and let them know that if they would like him to be an authorized occupant, he can submit an abbreviated version of your application so you can run a basic background check.

The HOA most likely has the authority to require the tenant be evicted by Owner, or may be able to do so themselves if Owner or their Rental Manager fail to act if they are in violation of the HOA rules.

You need the authorization in writing from the person who owes the debt.

However, regarding owner name you can also use the local county tax authority to verify in a lot of areas (at least here in Texas). 

The taxing authorities are much worse to deal with than any other agency.

Who has authority to make decisions for minor or major repairs?

Probably nothing but a little time and aggravation.Report the notary to whichever authority regulates them in your city/state.

If you build near a water source or lake, you will have to jump through hoops with the Corps or the local authority. 

@Reed MeyerBefore you get to far go down to the county zoning and planning department and see if the parcel is allowed to be subdivided.If it is, then get a civil engineering / land planning firm to subdivide the lots.But first confirm with local authorities

A registered agent has no authority to sign legal documents.