Oct. 1, 2014

To Whom It May Cocern

During my absence I hereby authorize Mr. Rame Ahmed Mostafa / Sandra Marquez to transact all legal documents and collect the room rental payment every month from the tenants.

Persons mentioned above have the right to implement lawful rules accordingly.

Thank you for your kind consideration.

Respectfully yours,
Genecito Jimenez

2 answers

"To Whom it May Concern,"

"the tenants" -> "my tenants"

"Thank you for your consideration."
(Consideration cannot be kind. It is an abstract idea.)

I assume it's a vacation you're going on. Have fun!
Also ...

Rather than using the slash mark between the two people's names, you need to use "and" because they are two separate people, not two names for the same person.