To submit a formal request, you will need to log into privacy.zynga.com using your data request PIN and ID. This information can be found in the Account Info menu located in the Settings section. Additionally, step-by-step instructions on how to find your data request PIN and ID can be found here.
Once you have found your PIN and ID, please log into privacy.zynga.com and follow the instructions for Account Deletion Request listed here.
Please note that this process can take up to 30 days to complete.