spousal visa , wifes letter?

My husband {Ven on this site} has went back to the US to apply for a spousal visa . He has informed me that I should write a letter to put with the application.
I have no idea what I have to write in this letter , we have been married for 3 and half years .
Can anyone give me any tips ??

thanks in advance.

Blyss

You just need to say that you support his application, have money to support him and somewhere for him to live.


Victoria