(1) No obligation is established by promising a fee for providing a demonstrable referral of the opportunity to conclude a marriage or for acting as a broker in arranging a marriage. What has been paid on the basis of such a promise may not be claimed back on the grounds that there was no obligation.
(2) These provisions also apply to an agreement by which the other party has entered into an obligation in relation to the broker for the purpose of fulfilling the promise, in particular to an acknowledgement of a debt.