You may move out if you wish. However, please know that sometimes a lender will send inspectors to short sale homes to verify occupancy. If the inspector finds a home vacant they may execute the lenders right to secure, manage & even winterize the property. This can lead to a filing of foreclosure or if a foreclosure is already underway it may lead to a foreclosure acceleration. When they secure the property they may have the right to enter the home and remove any personal property they find if it is deemed detrimental to the property.