See AMGuk.co.uk for FAQs - but one thing...
Dear Samples4.com customer, We are very sorry we recently had an error with our database that has resulted in the loss of some address details for a small number of customers. If you have been affected simply update your details when you place a new order. Please be assured it was a simple data error an none of your data has been compromised in any way. Thank you for your co-operation and sorry for any inconvenience caused. Your Samples4.com Team.