Securities are defined by the Securities Act of 1933http://www.sec.gov/about/laws/sa33.pdfThe definition is:The term ‘‘security’’ means any note, stock, treasury stock, security future, security-based swap, bond, debenture, evidence of indebtedness, certificate of interest or participation in any profit-sharing agreement, collateral-trust certificate, preorganization certificate or subscription, transferable share, investment contract, voting-trust certificate, certificate of deposit for a security, fractional undivided interest in oil, gas, or other mineral rights, any put, call, straddle, option, or privilege on any security, certificate of deposit, or group or index of securities (including any interest therein or based on the value thereof), or any put, call, straddle, option, or privilege entered into on a national securities exchange relating to foreign currency, or, in general, any interest or instrument commonly known as a ‘‘security’’, or any certificate of interest or participation in, temporary or interim certificate for, receipt for, guarantee of, or warrant or right to subscribe to or purchase, any of the foregoingSo, are loans securities?

Do you have to provide a Birth Certificate?

He also proposed making the rehabs "green," but I read that it only increases the value of the home by 5.5-9%, and the green certification fees run from $2-5k.

Have them provide you with a certificate of insurance when they buy it.

you are more than welcome to ask the sellers for more detailed information, specifically on the septic installation, and pests/  Many people ask for a septic certification and pumping, so you get it in working condition. 

No matter what company you go with, you want their proof of workers comp as well as an additional insured certificate  naming you as an individual and your business entity."

I purchased a primary residence with 5% down through Fannie Mae and signed an occupant certification.

Estoppel certificate, bank statements, rent payment schedules, ect...

One way, you can hire a mold remediation company and get a mold certificate after. 

Plus it is much easier to estimate and renovate since we are taking care of interior only.ANswering your question about FHA Certification - I don't know, but thanks for the suggestion I will find the answer out.Thanks for your reply!