Mandate
There are many different situations in which you need to give another person responsibility for carrying out a particular action on your behalf. For example, you could be leaving on vacation and not have time to sell your car or sign the lease for a new apartment. Or you could be physically disabled, but mentally sound, and need someone to carry out your financial transactions. In each case, you can use a mandate to give a person you trust responsibility for handling these actions on your behalf.
Example:
I, the undersigned, Mike Smith, currently residing at 2424, rue Rostand in Québec, hereby name as my mandatary Shawn Jones, currently residing at 1212, rue Bellemare in Montréal.
I grant him the power to:
Rent in my name and on my behalf, from Bloc Hugo inc., an apartment bearing the street address 114-233, rue Alexandre, in Montréal, from July 1, 2008 to June 30, 2009;
Agree in my name to pay a sum of $800 rent per month during that period;
Sign all relevant contracts and documents including the standard lease for a dwelling, and perform any act necessary for the execution of this mandate.
Signed at Québec, this 12th day of February, 2008.
__________________________________

Acceptance (optional)
I, the undersigned, Shawn Jones, agree to perform the mandate entrusted to me in this document by Mike Smith.
Signed at Montréal, this 16th day of February, 2008.
__________________________________

__________________________________
(address)

The type of mandate presented here authorizes a person to carry out everyday administrative tasks on behalf of another person – for example, to pay bills or perform bank transactions, or to sign a lease for an apartment or a contract to sell a building. In other words, the mandate concerns only the administration of property. It is commonly known in English as a “power of attorney”.

Remuneration of the mandatary
The mandate is presumed to be carried out for remuneration if the services are provided by a professional, but friends or family members are presumed to perform the services without charge.
There is nothing to prevent you, however, from stipulating that a friend or relative receive financial compensation. The two of you should discuss the matter and make sure everything is clear from the start, since the law will require you to pay the agreed amount.
It is important to realize that you will have to pay the amount whether or not the mandate has been successfully completed, provided, of course, that the mandatary is not at fault. You can avoid this problem by including a clause in the contract stating that payment will not be made in the event of non-completion.
http://www.justice.gouv.qc.ca/english/publications/generale/...