Personally Identifiable Information ""Personally identifiable information"" is information that can be used to uniquely identify a user such as name, address or credit card number. If you are an EU user, ""personally identifiable information"" means ""personal data"" within the meaning of article 2 a) of the Directive 95/46 of 24 October 1995. You may be asked to provide personally identifiable information during the sign in process, and then in connection with the use of Valves products, services and online sites. While Valve collects personally identifiable information on a voluntary basis, for certain products and services Valve's collection of personally identifiable information may be a requirement for access to the product or service or to process a users order. 