How do you write a letter showing proof of marriage?

To whom may it concern:

My name is--------, Born in ------------ on ---------.

This letter will confirm that I have known my friends-------and -------for about 3 years now, I maintain regular contact with them and we visit each others places on a frequents basis. They have a happy and strong marital relationship and they have a very comfortable home that my family.

They are very understanding couple that care for one another, and that is one of the reason that me and my husband pick them to be part of our family, we are very glad be ---- and ------ friends and me and my family hope that our friendship will last a lifetime.

If you have any question regarding their relationship and my friendship with them, please feel free to call me at anytime, at -------, -------- by mail or at (---)------- by phone.

Yours Truly,

_______________

Your name