Illustrative example
A buyer and a seller shake hands on a plot of land. The buyer pays a deposit, clears the brush over two weekends and puts up a fence. The seller then receives a better offer and says there was never a deal.
A contract for the sale of real property or an interest in it is void unless the contract, or a note or memorandum of it expressing the consideration, is in writing and subscribed by the party to be charged. Subdivision 4 is the escape hatch - nothing in the section abridges the power of courts of equity to compel specific performance in cases of part performance - and that turns on whether the buyer's conduct is unequivocally referable to the agreement alleged, which is a demanding test and an equitable remedy rather than a right.
The seller repays the deposit and the documented cost of the clearing and the fence, and the buyer releases any claim to the plot, so that neither of them has to test the part-performance doctrine.