13. Forfeiture of deposit: Where any tender or bid is accepted pursuant to this Act for the arrangement of contract, if a person who has submitted the tender or made bid fails to obtain a letter of execution or to take over the lease, the deposit furnished by that person pursuant to Section 6 shall be forfeited and devolved on the Government of Nepal. Provided that such a letter of execution or lease has not been issued to such a person despite that the person has appeared to obtain the letter of execution or lease, his or her deposit shall not be forfeited pursuant to this sub-section.