Section 45. A city, state, county or municipal treasurer or other official or private employer who receives a written request from a pensioner or retiree shall, at the direction of said pensioner or retiree, forward any payment made under a pension or retirement fund or plan to a credit union that shall be designated by said pensioner or retiree. Such payment shall be deposited, with the approval of said pensioner or retiree in his designated account. Such credit union shall notify promptly the pensioner or retiree of any deposit made pursuant to this section.