What does Per mean before the signature?

[compiler]

There is a home remodeling Mechanic’s Lien Waiver. In the last it words as “This mechanic's lien waiver shall become in effect as of CONTRACTOR Per." Then the contractor signs his name. What does Per mean before the signature? Thank you for your answer.

 

[tedmc]

not a teacher

The abbreviation 'pp' which stands for 'per procurationem' is used for signing on another person's behalf.
http://www.oxforddictionaries.com/definition/english/pp

 

[compiler]

I am not talking about "pp" but Per before the sinature. Can anyone explain it?

 

[probus]

"Per" indicates that the person signing has the authority to bind the named signing entity (corporation, partnership or individual).