Lady disputes her last cut, and finally sends in her payment minus the last cut. On the back of the check, underneath where it says "do not write below this line", she writes...... "Negotiation of this instrument constitutes payment in full." So, what do you do? 1. Send the check back to her and demand full payment. 2. Underneath her words on the back of the check, write... "Cashing of this instrument does not constitute full payment, as this is only partial payment." Then cash the check. 3. Eat the last cut and be done with this scum. Whatcha think?