The Postal Service voluntarily follows the guidelines set forth by the Federal Trade Commission (FTC) when the Postal Service wants to contact individual customers in order to provide them with information for reasons that differ from the original reason that the customer provided his or her personal information. For example, these guidelines apply when the Postal Service wants to send the customer marketing or advertising communications that relate to a different product or service than the customer has previously selected. Additionally, these guidelines apply when the Postal Service wants to share personal information externally with third parties other than Postal Service contractors and service providers. Refer to 3-9 for policies related to collecting contact information from businesses.