By law in the state of Delaware, home sellers are required to disclose any known defects regarding a property before the time of sale. This is to ensure that buyers are protected from buying homes or properties that are, in effect, lemons. What does the seller have to disclose specifically? Included on the form from the state of Delaware are sections for HVAC, structural, plumbing, roof and electrical. If you want to see this document for yourself, CLICK HERE.