The short answer is: yes it can. But it depends on your situation:
If you have positive accounts on your report when we delete the negative accounts, and your scores will go up. This is a common scenario.
However, if you have NO positive accounts on your report, it will go up and down until it resets to NO SCORE. This means you have a clean slate and with our guidance, we can work on REBUILDING your credit from the ground up.