CDP shall not be liable for any losses, damages, claims, costs, demands, expenses and liabilities of whatsoever suffered or incurred by any Participant howsoever arising from any forgery of the Authorised Signatories' signatures or any alterations or forgery of the prescribed forms, notices, instructions, requests, demands or other communications which are made in writing pursuant to Rule 21.1.1 where such alterations or forgery cannot be easily detected or where the alteration or forgery is due to the Participant's negligence.