Using the results of the automated match against DWP records
In order to complete the identity check that is also required for an overseas elector to register to vote, information contained in an application to register is sent to the DWP for matching.
This will include a check of the postcode for the address at which the applicant was previously registered or previously resident.
A positive DWP match may therefore provide you with sufficient evidence to be satisfied that the applicant can be linked to the previous address provided in their application, as well as providing verification of their identity.