Disclosing known issues about a property during a sale is handled through the Seller's Property Information Form. This form is completed by the seller and passed to the buyer’s solicitor as part of the conveyancing process. It lists known defects or problems that could influence a buyer’s decision or the property's value—things like structural problems, damp, boundary disputes, planning permissions, guarantees on alterations, or other material matters. Providing this information helps protect both parties and reduces the risk of misrepresentation after completion. The other documents have different roles: the Mortgage Deed is the agreement that secures the lender’s interest in the property, the Transfer Deed is the legal document that transfers ownership to the buyer, and the Building Regulations Certificate confirms that any building work done complies with regulations. None of these specifically serve as the seller’s disclosure of known property issues. So the document that discloses known issues affecting a sale is the Seller's Property Information Form.