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The request for a YP code must be made in writing. This must be from the owner or director of the company and on letter headed paper. 

The request must be sent to the Customer Payments team:

Customer Payments Team
NHS Business Services Authority
Bridge House
152 Pilgrim Street
Newcastle upon Tyne
NE1 6SN

Include all of the OCS codes you're making the request for. All OCS codes would have to be paid into the same bank account.