(1) The third party notifies the insurer in writing of the loss occurrence from which he or she wishes to derive a claim against the policyholder, or against the insurer in accordance with section 115 (1), within two weeks after he or she has learned of the loss occurrence; timely dispatch suffices for compliance with the time limit.
(2) If the third party asserts the claim against the policyholder in court, he or she must notify the insurer in writing of that fact without undue delay.
(3) The insurer may demand information from the third party insofar as it is necessary for the establishment of the loss occurrence and of the amount of the loss. The insurer may also request that proof be furnished insofar as the third party can be reasonably expected to obtain such proof.