the defendant personally, or to an agent or other person on his behalf, he shall require the signature of the person to whom the copy is so delivered or tendered to an acknowledgment of service endorsed on the original summons. Evidently, the expression “other person” in Rule 16 refers to an adult member of the family of the defendant. Acknowledgment of service of summons referred to in this provision shall be obtained by making an endorsement on the original summons. If that be so, the provision contained in Order V, Rule 15 of the Code does not contemplate service of summons sent by registered post on an adult member of the family of the defendant. It is also to be noted that as per the provision contained in Rule 18 of Order V of the Code, the serving officer shall, in all cases in which the summons has been served under Rule 16, endorse or annex, or cause to be endorsed or annexed, on or to the original summons, a return stating the time when and the manner in which the summons was served, and the name and address of the person (if any) identifying the