Given a partial address comprising of premise number/name and postcode, AddressVal™ will return one or more address matches from the Royal Mail PAF database. If AddressVal™ is able to find an exact match on the database, a single result is returned to the user, containing full address details. If an exact match cannot be found, AddressVal™ will return a number of possible matches, from which the user may make a selection. Each returned match will comprise of the full UK postal address. This API uses both RESTful and SOAP protocol. Responses may be formatted in either XML, JSON or CSV. Unified Software is the leading provider of UK and International financial web services.