Section 20. A defendant shall not avail himself in defence of any omission to state in such notice the name or place of residence of the person injured, or the time, place or cause of the injury or damage, unless, within five days after receipt of a notice, given within the time required by law and by an authorized person referring to the injuries sustained and claiming damages therefor, the person receiving such notice, or some person in his behalf, notifies in writing the person injured, his executor or administrator, or the person giving or serving such notice in his behalf, that his notice is insufficient because it fails to state the name or place of residence of the person injured, or the time, place or cause of the injury or damage, as the case may be, and requests forthwith a written notice in compliance with law; provided, that if the notice does not contain either the place of residence of the person injured or the place of residence or business address of the person giving or serving the notice on behalf of the person so injured, such notice of insufficiency shall not be required, and the defendant may avail himself in defence of any omission or defect in the notice. If the person authorized to give such notice, within five days after the receipt of such request, gives a written notice complying with the law as to the name and place of residence of the person injured, and the time, place and cause of the injury or damage, such notice shall have the effect of the original notice, and shall be considered a part thereof.