If we are unable to find you in any other way we use the services of AFD Software, a company which specialises in contact-details validation. Read more about AFD Software on their website.
We securely transfer the personal details (name, sex, date of birth, and last known address) of study members to AFD. AFD then use these details to identify our study members in a range of other databases which are managed by other companies including Royal Mail and Experian. When study members are successfully matched to another database then AFD will supply us with updated addresses and we will use these to try and reach you.
No information other than contact details is shared with AFD. AFD do not have access to any other information which may be held in the other databases that they search. AFD are contractually obliged not to use the information we share with them for any other purpose and they destroy all data after each matching exercise is complete.