How to Deposit Stock Certificates Into a Brokerage Account

Endorse and date the stock certificate. Turn your stock certificate over and sign it exactly as the name appears on the front. The account you are depositing into must have the same name. If it is written to a single person and the account is a joint account there may be additional steps. Place the date near your signature.
Write the name of the broker on the back where it states 'constitute and appoint
__ Attorney.' This is where you put the name of the bank you are depositing it into, such as USAA or Ameritrade. This ensures that if it gets lost someone else will not be able to deposit it.
Write your brokerage account number under your signature. This will make sure it is deposited into the right account. This number should be located on your most recent statement.
Make a copy of both sides of the certificate and mail the original certificate to the address of the brokerage company. Choosing a certified mail option, will give you peace of mind that your package arrived safely. Watch your account statements to make sure the certificate has been deposited, and that the number of shares is correct.