Final answer:
Antje is fulfilling the fiduciary duty of disclosure by delivering all pertinent paperwork to her clients after the property closing. This duty requires transparency and provision of all material facts relevant to the transaction.
Step-by-step explanation:
Antje is acting under the fiduciary duty of disclosure. This duty obligates her to provide all relevant information to her clients that might affect their transactions. Since the clients have closed on their property, Antje must ensure that any remaining paperwork, which could include important details about the property or the transaction, is delivered to them promptly.
In real estate transactions, this fiduciary duty is crucial as it involves honesty and transparency in providing all material facts to the client. If Antje withholds any important paperwork, it could result in future complications for her clients, and potentially legal repercussions for Antje as it would be a breach of her fiduciary duties.