NBS has used Stralfors since 1998, and the Cornwall-based specialist print company currently mails out 12m letters per year to existing and potential NBS donors, to remind them of locations and timings.
"This new contract demonstrates our position as a tried and tested partner, and gives us the opportunity to build on our relationship," said Stralfors business area manager, Brian Hooper.
Through additional contracts with NBS, Stralfors also provides printed promotional items such as posters and leaflets.
Stralfors clients include the DVLA, Prison Service, Next, John Lewis, Scottish Power, HSBC and Lloyds TSB.
Story by Andy Scott