Petterson v. Pattberg

Pattberg (defendant) held a mortgage on Petterson's property and offered a $780 discount if Petterson paid off the full remaining balance by a certain date; Petterson arrived at Pattberg's house with cash in hand, but before he tendered any money, Pattberg told him he had already sold the mortgage to a third party and revoked the offer. Petterson had to pay the third party the full amount instead, and his estate's executrix (plaintiff) sued for the lost $780 discount; the trial and appellate courts ruled for the executrix.