And be it enacted that
when any compensation awarded as aforesaid shall have been paid by mistake of
fact or law to a person or persons not lawfully entitled to receive the same,
such mispayment shall not affect the title of the party paying the same to the
land in respect of which the same shall have been paid, nor shall such land be
subject to any lien for the sum so mispaid; but the persons lawfully entitled
to receive such compensation, or his, her or their lawful representatives,
shall or may recover the same within 18 months from the date of such payment
by action for money had and received against the person receiving such
mispayment, or his or her lawful representative.