A stock certificate is preprinted on the front with the name and address of the company issuing the stock. If you have a stock certificate, there are only a couple of instances that require you to fill it out--when you are selling or transferring your shares or you need to change to your personal information.
Enter the shareholder's name and address on the back of the certificate. If it is held jointly, include each shareholder's information.
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List the tax ID number of each shareholder. For individuals, this is a Social Security number. For a business, it is the employee identification number issued by the Internal Revenue Service.
Sign the back of the stock certificate after filling out the changes.