The CustomerDocumentDisableList property restricts users from editing or deleting documents on the Documents tab of the Customer section. If a user selects a type that has been entered in this property's disable list, uploads a document and tabs off, the grid will be disabled.
Config Option > User > User_UserSetting
Null (empty value)
The possible values are the SystemName values of the choice codes entered in the CustomerDocumentType Category. Multiple values can be entered by separating each value with a comma (without spaces).