Most investments will require an application to qualify he investor for certain types of investments.
Most Accredited Investors will meet the threshold for certain advanced investments and financial instruments.
Standard, non-Accredited investors may qualify for less risky investments.
Mortgage/Real Estate/Loan products are available to most investors.
In order to qualify for more advanced instruments and investments, financial documents may be required to show net worth, income, stability, banking, and prior trading in securities investments, bonds, etc. Should show capability and wherewithal to engage in sophisticated investments.