Detecting and prosecute misuse
We retain usage data including IP-addresses for the purpose of detecting and – as the case maybe – prosecuting misuse of the ZF Websites. Unless required for prosecution purposes, the data will be deleted after 7 days. The retention and use of the data is based on statutory provisions which justify those operations on the grounds that (1) the processing is necessary for the performance of the Agreement including the Terms of Use regarding the ZF Websites; or (2) ZF has a legitimate interest in ensuring the functionality and security of the ZF Websites. 7. Deletion of data
Generally, we delete personal data as soon as it is no longer necessary in relation to the purposes for which the data was initially collected or processed. In case the processing is based on consent and you withdraw your consent we will delete your personal data without undue delay after the withdrawal unless we are legally required to retain the data.
Do I have the right to erase my data? 
In case the processing is based on consent and you withdraw your consent we will delete your personal data without undue delay after the withdrawal unless we are legally required to retain the data.