In 2007 Guarantee-Audit became a member of Kreston international.

Kreston International is a worldwide association of independent accountancy and advisory firms. Founded in 1971 it offers quality services through member firms located around the globe. According to the data released in 2008 Kreston International is the third largest audit and advisory associations in the world, covering 95 countries with 700 offices providing a resource of over 20,000 professionals. In 2008 the earnings of the association exceeded $2 bn.