I chose the lab called Maxxam. They have a special on right now. The representative was very nice and helpful, she can explain everything. I sent her half the cost, and also the letter from the visa office (Haiti). The lab will then notify your visa office that you've paid. The embassy will contact your husband with instructions where and when to do the test. The specimen will be forwarded to the lab in Canada, results will be ready in 4-6 days. You half to pay the other half when the results are ready. My husband and child are both in Haiti so they will do the test together. Not sure how it works since your child is in Canada, but the lab will explain that when you call. Don't worry.