How to write clearance certificate from past employee?

Quito, 12 april 2013

Certificate of employment

TO WHOM IT MY CONCERN:

By petition of the interested, I have well certify that MissLeon MAriawith I.D. 1356782, has worked in the Mediterraneo Ocean, like of Cashier.

From 19 February to17 August 2012.

Time in the which the MissLeon has demonstrated to be a honorable person. These qualities have earned her our appreciate and consideration.

It is all I can say in honor of the true.