Instruct: Classify the following sentence into a predefined topic category:
Is the controller obliged to maintain, acquire or process additional information to identify the data subject if it is not required for the purpose of processing personal data?
Assign it to one of the following topics:[General provisions, Rights of the data subject, Cooperation and consistency, Controller and processor, Final provisions, Provisions relating to specific processing situations, Remedies, liability and penalties, Independent supervisory authorities, Transfers of personal data to third countries or international organisations, Delegated acts and implementing acts, Principles]
Output: