The Post Office launched a pitch for its direct marketing and branding business in February.
Marketing director Gareth Hockey-Morley, who joined as marketing director in September 2006, led the review.
The branding responsibilities include design, positioning and brand insight while the direct marketing remit takes in online and direct response activity.
The tender stated that the agencies will help the Post Office in its migration of the business from “product focus to customer-centric”.
Mother handles the advertising for the Post Office and won the £12 million business in March 2007 after a pitch against DDB London and Grey.
The Government has been considering proposals to turn the Post Office into a full service bank to help maintain services within inner city areas that were previously provided by high street banks.
DraftFCB were unavailable for comment at the time of going to press and a spokesman for the Post Office declined to comment.