(5)No insurer to whom the notice referred to in sub-section (2) or sub-section (3) has been given shall be entitled to avoid his liability to any person entitled to the benefit of any such judgment or award as is referred to in sub-section (1) or in such judgment as is referred to in sub-section (3) otherwise than in the manner provided for in sub-section (2) or in the corresponding law of the reciprocating country, as the case may be.