Arizona is a deficiency state - meaning lenders can sue you to recover any losses due to your default on your loan after they seize your home and sell it at auction. The Arizona legislature passed a law that protects you against deficiency judgment resulting from your default on your initial home purchase loan.
If you later refinance the loan you used to purchase your Arizona home, the deficiency protection you had is now gone. Ignoring the lender and letting them take your home is not the end of the problem. Even if the lender is barred from or decides not to get a deficiency judgment against you, they will send a 1099 to the IRS for the amount of your DEBT RELIEF (equal to their loss) after the home is sold at auction. And that amount includes all of the legal and administrative fees as a result of your default in addition to any unpaid principle and interest, taxes, insurance they keep paying, etc.
As soon as know you are in trouble and can no longer pay your house payment, you must call your lender to explain your situation. Start the dialogue. Don't hide. Lenders will take into account severe hardships that are out of your control - loss of job, divorce and serious medical issues being the top three worse occurrences in anyone's life. They will work with you to come up with a long term workout program so you can continue living in your home and eventually pay back the delinquent payments.
Your best option is to call a professional Realtor with years of workout experience with lenders, as I have, to get your home on the market and sold before deferred interest resulting from non-payment, late charges, legal and administrative costs start adding up and you loose your home through foreclosure. If the lender is sympathetic, they may agree to work with us to accept less than full payment of your loan to comply with the terms of the new buyer and avoid having to foreclose on you. The added benefit to you is your credit history will look much better than having a foreclosure.
The worse thing a homeowner in trouble can do is move out of the house. Don't abandon your home. The lender is much more comfortable having you live in and continue to take care of the home. They don't want your home vacant and vandalized. Stay put, call them, authorize your Realtor to negotiate with the lender, get the home on the market at or below market value. We are all here to help you through this crisis the best way it can be done.