In various embodiments, a personal data processing system may require guardian consent (e.g., parental consent) for a data subject in order to collect, store, and or process the subject's personal data. The system may prompt the data subject to initiate a request for guardian consent or the system may initiate a request for guardian consent without initiation from the data subject (e.g., in the background of a transaction). In some embodiments, the system may require guardian consent when a data subject is under the age for valid consent for the particular type of personal data that will be collected as part of a particular transaction. Data processing systems may generate and store one or more consent records memorializing valid consent for data processing from data subjects and/or from guardians on their behalf (e.g., in the case of a minor data subject).