There is no application, no registry and no certificate. Nobody is issued accredited investor status, and no government body maintains a list of who holds it. What an investor is actually asked for depends on which exemption the offering relies on — and the difference between the two common ones is significant.
Rule 506(b) offerings may not be generally advertised. For an investor treated as accredited, the issuer must have a reasonable belief that the investor meets the accredited-investor definition, based on the facts and circumstances. A questionnaire or investor representation may be part of that process, but self-certification alone is not necessarily sufficient without other information supporting that reasonable belief.
Rule 506(c) offerings may be advertised publicly, but all purchasers must be accredited investors and the issuer must take reasonable steps to verify their accredited status. Depending on the circumstances, verification may include tax forms, brokerage or bank statements, or written confirmation from a registered broker-dealer, an SEC-registered investment adviser, a licensed attorney or a certified public accountant.
So what one investor is asked for can look nothing like another’s, even for a broadly similar investment. Either way the tests are measured at the time of sale, so status is not permanent — it can be met one year and not the next.