We should all play nice here.
A â€œCash For Keysâ€ agreement with an official representative of the bank is designed to trump anything else. Thatâ€™s the intent and purpose of such an agreement.
Caligirl, you don't have to leave in three days. A 3Day Notice is a precursor to them filing an unlawful detainer action against you, which is the procedure used to evict someone. As long as you have a cash for keys agreement signed by the bank (or their representative) you should be fine. They are protecting themselves in the event you don't live up to the terms of the agreement you signed with them.
In the event you are actually served with the unlawful detainer lawsuit (which is unlikely) a judge would probably be on your side because of the cash for keys agreement you have.
You would probably be well served to have an attorney or real estate broker take a look at your paperwork to be sure.
I hope this is actually helpful.
National Featured Realtor and Consultant, Mortgage Loan Officer, Lecturer regarding Credit Repair