Why do you need an alternative?
Just send them this, and they will do the rest:
Dear Friends and Family,
As you know, (whoever it is) is seeking Permanent Residence status in Ontario, Canada through the Family Class immigration category. As part of the immigration application we are required to provide evidence that we are indeed a genuine couple. This includes written correspondence/chat logs, plane ticket stubs, photos, etc. We are also required to document the history of our relationship (which was kind of a fun exercise).
An important part of this evidence of our genuine relationship is documentation from family and friends. From reading Canadian immigration blogs it appears that the more documentary evidence we can provide, the more likely our application will be approved swiftly, or at least not denied on this basis.
So we are writing today to ask if you would write an email on our behalf and send it to us by (a reasonable time-frame). We realize this request is somewhat vague as to the content of the email, so we've included a list of basic points to cover at the bottom of this message. You are certainly welcome to write more, or less...whatever you are comfortable with putting in writing to support our Family Class application.
For those of you who respond, please accept our heartfelt gratitude for your timely assistance in this matter. For those who chose not to respond for any reason, please know that we accept your decision with much grace and goodwill.
Kindest regards,
-(you and your spouse)
P.S. General information to consider including in your message (this can be written in French or in English, by the way)...
1. A description of how you know either one of us (typically the person you knew first)...examples
I am a friend of XXX, I am the sister of XXX, I have known XXX for XXX years, etc.
2. A description of how you became aware of our relationship, when you met the other partner, activities we participated in together, etc.
3. A statement to the effect that, in your judgment, we are in a real, loving, ongoing, genuine (you choose the words) relationship based on your personal knowledge and experiences
