Before applying for a mortgage you may need a Decision in Principle (DIP), sometimes referred to as an Agreement in Principle (AIP). A DIP gives an indication as to how much you could borrow from us and many sellers or estate agents ask to see your DIP as assurance that you can get a mortgage. A DIP means the society is, in principle, prepared to make a loan up to the amount indicated. It is not a mortgage offer and does not bind the society to make one. A mortgage offer is subject to full application, valuation and meeting the society's lending policy.