Final answer:
Legally required exemptions to the need for written notice exist, such as those outlined in the FOIA, which include issues like national security and personal privacy rights.
Step-by-step explanation:
There is an exception to the requirement for written notice when sharing information with a third party, and it involves legal requirements. For example, there are nine exemptions under the Freedom of Information Act (FOIA) that allow for the sharing of information without written notice. These exceptions concern matters such as national security, internal personnel rules, trade secrets, personal privacy rights, law enforcement information, and oil well data. Agencies are also required to regularly post certain types of information publicly without a specific request.