So I haven't gone far in my permanent resident application but I have been hearing that I need the last 10 years of job history. The company that I work for now, I started working here July of 2007, so just three months shy of ten years. Shortly before I started at my current company I worked at a company for 4 months and I HATED that job. Its not like I burned my bridges necessarily but I think my colleagues knew that I couldn't stand the place (was dirty, unprofessional, people came to work cursing and drunk and it was supposed to be a professional job). It was 4 months of my working life that only gives me nightmares when I think about it and prior to today I didn't think I would ever need anything from there . Also my boss was quite petty, he was pretty upset that I was leaving after 4 months and basically treated me really badly after I gave in my resignation letter. The point is I CANT go back to them and ask for any kind of letter. I did NOT include this in Express Entry profile, but if I mention this job in my application since it falls within the ten year gap, do I need to get something from that company?