Ehhhhh... Hate something like this especially when you don't have like that much to prove from what I read from others what they want to see... Is first letter from a potential employer that he expects him to start working for him.... But still I don't know how easy it is to get something like this or someone gave the idea of showing that you are in touch with an HR company and that they are looking for positions for him... Also if it's possible to show that you are looking for an apartment to rent there again maybe a renting company... Or something like this... Or letters from friends, family stating that they will help you once you get there... And that they are expecting you actually... I hope this works... But maybe also a letter with a plan exactly what you will be doing once you get to Canada... Like my friends (name) has a friend name that will rent us an apartment... And we will be looking for a job with the help of my friend (name)! Actually maybe someone that already responded to this type of requests has a better options. But I am actually really in the dark if we receive a request like this! As my husband also is outside of Canada and he has been outside of Canada for two years now... And what can we prove if we are here... Well I can only help for the best! Even though we did write a cover letter when we applied explaining why my husband been outside of Canada to be with me through this process... And that we want to start there our lives, have babies... Don't if that will do the magic...
By what date you need to send them what they asked for?