Guidelines 02/2019 on processing of personal data under 6(1)(b) GDPR in the context of the provision of online services to data subjects

Section 2.3  Scope of Article 6 (1)(b)

22. Article 6 (1)(b) applies where either of two conditions are met: the processing in question must be objectively necessary for the performance of a contract with a data subject, or the processing must be objectively necessary in order to take pre-contractual steps at the request of a data subject.