Depending on who you are serving changes the personal service requirements in Ontario Small Claims court.
The Rules State:
Personal Service
8.02 If a document is to be served personally, service shall be made,
Individual
(a) on an individual, other than a person under disability, by leaving a copy of the document with him or her;
Municipality
(b) on a municipal corporation, by leaving a copy of the document with the chair, mayor, warden or reeve of the municipality, with the clerk or deputy clerk of the municipality or with a lawyer for the municipality;
Corporation
(c) on any other corporation, by leaving a copy of the document with
- an officer, a director or another person authorized to act on behalf of the corporation, or
- a person at any place of business of the corporation who appears to be in control or management of the place of business;
Board or Commission
(d) on a board or commission, by leaving a copy of the document with a member or officer of the board or commission;
Person Outside Ontario Carrying on Business in Ontario
(e) on a person outside Ontario who carries on business in Ontario, by leaving a copy of the document with anyone carrying on business in Ontario for the person;
Crown in Right of Canada
(f) on Her Majesty the Queen in right of Canada, in accordance with subsection 23(2) of the Crown Liability and Proceedings Act (Canada);
Crown in Right of Ontario
(g) on Her Majesty the Queen in right of Ontario, in accordance with section 10 of the Proceedings Against the Crown Act;
Absentee
(h) on an absentee, by leaving a copy of the document with the absentee’s committee, if one has been appointed or, if not, with the Public Guardian and Trustee;
Minor
(i) on a minor, by leaving a copy of the document with the minor and, if the minor resides with a parent or other person having his or her care or lawful custody, by leaving another copy of the document with the parent or other person;