Missed correspondence

[actuary]

Hi all, I applied for Canada immigration some 3 years ago and came to know last month that the Canadian embassy requested my documents for immigration last june. The mail never came in (or was lost) and while enquiring for some thing else, they reminded that i still haven't sent in the docs. Anyhow they sent a copy of the original letter.

As far as I know, I can still send in the docs (as per the letter) but of course they won't be taken into consideration immediately. I wanted to know if anyone has a rough idea how long would that take? Someone with similar (unfortunate) experience?

Thanks