The firm will continue to provide secure delivery of UK passports, supporting documents and internal mail for the IPS, a contract it has held since 2004.
Since the secure delivery contract began, the firm has reduced losses by 96% and investigation rates have fallen by 74%. It has also been recognised by the Home Office for helping it to save £3.2m in the 2011/12 financial year.
DX Group chief executive Petar Cvetkovic said: “We are delighted to be recognised as a supplier who exceeds our customers’ expectations.
“We aim to provide a great service that is reliable and secure to all our customers and are delighted that the efforts and commitment of all DX colleagues have been acknowledged as doing so.”