old stationary, Invoice forms, gift certificates and additional printed matters which have been used by the Franchisee in accord- ~-:= :~" 's Agreement must be returned immediately to the Franchisor for immediate destruction. The Franchisee undertakes : .; -: .e a y direot or Indirect referral which would lead any customer to presume a continued pertinence of the Franchisee to ._:;-a " :fel -Franchisee-Chain or which could trigger a danger of confusion of whatever nature with the customers between "S :_s ~ess of the Franchisor and of the Franchisee