The brand, which translates as Gold Coast, sits alongside Toblerone, Milka, Dime bar and Terry's Chocolate Orange in Kraft's confectionery stable.
Terry's Chocolate Orange and Toblerone have received significant investment in recent years, the former through the 'It's not Terry's, its mine' campaign starring Dawn French, and Toblerone with a £1m spend last year.
Côte d'Or, however, has remained in the background and has until now not been viewed as a major brand in the UK.
Kraft is understood to have contacted several direct marketing agencies about its future strategy for the brand, with a pitch expected to take place next month, although it declined to comment.
The appointment would mark the second major marketing investment that Kraft has made in its confectionery business this summer. Earlier this month, it announced that it is to relaunch its classic Dime bar as Daim to bring it in line with its other European markets.
Kraft has also recently launched three Côte d'Or dark chocolate variants in France: Fondant de Noir chocolate with 60% cocoa, Fondant de Noir Poire chocolate combined with pear pieces, and Noir Framboise chocolate with raspberry pieces.
Ogilvy & Mather handles advertising for Toblerone, while work for Terry's Chocolate Orange is handled by DDB London.
In January Kraft unveiled a strategy to use online to promote healthy eating as part of its plan to change the way it markets its products. Websites following the model of UK site will soon roll out to other territories.
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