Preliminary title reports sometimes will show special assessments, liens on property if present. HOA, CCR's and Bylaws may mention assessments. Both of these documents are delivered/mailed to buyer during the escrow period. This is to be investigated during your inspection period and/or within five days of receipt of the prelim title and CCR . This also may of shown up on the settlement statement as a fee that was charged to seller or buyer or prorated at close. All of these docs would of been an indicator of assessment fee's prior to close. In addition, if it was on MLS the assessment was disclosured. How much or what for is the buyer's due dilengence to investigate. As for the SPUDs not being signed, and delivered after close? I don't know what your recourse would be. You may want to consult with AZ department of Realestate or legal council.