A private offering is not open to the public, but rather only available to a small group of purchasers that are able to safely invest due to their large amount of wealth or extensive knowledge about investments. Rule 506 in Regulation D of the Securities Act states that the issuer must reasonably determine if the investors qualify by being accredited or experienced in financial investment matters, and the investors should sign a suitability letter. Although these transactions are exempt from SEC registration, issuers still must provide investors with substantial information that allows them to make an informed decision. Rule 506 also restricts the issuer from offering securities publicly and requires the issuer to try and make resale of securities remain private.