Which field is required when the custodian type is set to 'Person'?

When the custodian type is set to 'Person', the first name is a required field because it is essential for identifying the individual associated with the custodian entry. Including the first name allows for better organization and differentiation between custodians, especially in cases where multiple people may have the same last name.

In the context of managing data and creating records related to custodians, having a first name ensures clarity, as it combines with the last name to provide a complete identification of the custodian. While other fields may contribute to the understanding of the custodian’s role or identification, the first name specifically is a fundamental requirement for a 'Person' type custodian entry.