What should I do with a defective product in Maryland? Maryland law requires that products being sold work as they should when used normally.Retailers have a duty to use reasonable care1 to discover a defect in a product. Call our office at 410-469-9953 or simply fill out our contact form to schedule a free consultation today. What Constitutes a Design Defect in Maryland? If you think that you may have a product liability claim, call the attorneys at Henderson Law to schedule a time to go over your case. This includes seat belts, seat mechanisms, airbags, and vehicle braking. Maryland Seller Disclosure form is a standard checklist that reveals the seller's knowledge about the condition of the property.