Receiving customs authorities need to be able to identify individual items within bulk consignments. As a result, there is a requirement to have data on individual items and to be able to associate this to the postage bag or receptacle being used to contain the consignment. This process is known as ‘nesting’. To achieve this, all items (excluding items of personal correspondence) must have electronic customs data submitted in advance. Accordingly, in order to comply with these requirements, and to ensure that your items will be delivered / not be returned, from April 2021 Royal Mail will no longer be accepting parcels via the Max Sort Service.