What happens if you get ABC instead of BBB?

Good day, I'm curious about a scenario where one might receive ABC instead of the anticipated BBB. Could you elaborate on the potential implications of such an occurrence? What factors could contribute to this switch, and how might it affect the value or utility of the asset? Furthermore, are there any established protocols or remedies in place to address such a situation, ensuring the smooth functioning of the market and protecting the interests of investors? Thank you for your time and consideration.