can you be fired for incidents that happened 1-2 months ago without being written up for those same incidents? Then 2 months later my boss uses them as reasons to let me go? Reason for dismissal was poor attitude.

If you were not warned about the behaviour or incident at the time, it is very difficult for your employer to terminate your employment for just cause and rely solely on these incidents. If your employer cannot establish just cause for termination, you are likely entitled to termination pay. To determine how much termination pay you may be entitled to, please contact our firm or visit the Severance Calculator (http://www.severancepaycalculator.com/).