IRS guidance allows for self certification. 

Certificate of Formation is filed with the Secretary of State    -  Additional later of defense: file it under an Agent Trust with yourself as a member - your name does not appear on the public filing, making it a needle in a haystack for anyone trying to find your assets.3.

My understanding is that (on a stick build house) if you go through the proper building dept requirements for updates then get a certificate of occupancy then it sells as if it has been there forever - no special financing required.

I am looking for any information on Tax Sale Certificate and where I can go to invest?

To get the best bang for you buck, you need to get a Mortgage Credit Certificate (MCC) with your VA loan here in Texas.

Having a will and death certificates is not enough, you need a letter of administration or whatever its called in your state from probate.If you do not have a clear title transfer from the deceased parents to him you do not have title. 

certificate of occupancy, I had to pay for all new exit signs while I was in contract.

In order to self-certify, a QOZ Fund simply completes a form and includes that certification document along with the QOZ Fund's federal income tax return filing for the year. 

For those experienced investors- have your certifications in real estate benefited your career?

@Anna Buffkin I utilize Estoppel certificates and RELY on these (they are a term of our contract) for all occupied rental purchases.