11.Bank Guarantee towards Warranty obligation ( wherever applicable) For items like machinery and Plant, Costly equipment, capital spares, the tenderer, wherever called upon to do so, shall furnish a Bank Guarantee of 10% of Material value to cover their warranty obligation. The model proforma of the Warranty/Guarantee bond is annexed as Annexure 5.3. It would be the responsibility of the contractor to ensure that Bank Guarantee (BG) required to be submitted by them, should be sent directly by the issuing Bank under registered Post to the concerned Purchasing Authority and, in no case should be brought by the tenderer. That is to say, the firm shall not involve themselves in transmission of the BG between the issuing bank and the purchaser.