The last company I worked for provided me a Certificate of Employment after job termination, but it only states my name, my position in the company, and the start and end dates of employment. Having left the office in somewhat bad terms/conditions (I'm still annoyed by how they treat people--firing them and making it look like we resigned on our own just so they look "good"), I'm hesitant to request a new one (one that states my full-time status/work hours and compensation) because the HR manager who handled my termination had left the company shortly after I did. However, I do have a copy of my last work contract, which specifies my compensation and work hours.
I'd like to ask if it's okay to just use the Certificate of Employment and my work contract as proof of my full-time work experience and compensation when applying for the 189 visa, or is it better to get a new one drafted?