For the purposees of sections 257A and 257B, the expression "persons form whom sum is due" or any other expression to the like effect shall mean the person so named in the application under sub-section (1) of section 257A whether such sum is due from him, personally or as a legal representative of any other person from whome the sum was so due and shall include a person-
(i) who is liable under section 257 as a surety of the person from whome the sum is or was so due, or
(ii) whose name is subsequently substituted for or added as, the person from whom the sum is or was so due.