The phrase "unfounded allegations" refers to claims or accusations that are not supported by evidence or proof. It means that someone is making statements about something or someone without any valid or reliable basis. Full definition
In addition, we will share best practices for how to combat unfounded allegations of gang membership in immigration cases, based on a national survey of advocates conducted in fall 2017. (ilrc.org)
To allow a lawyer to make wild, unfounded allegations against the other parent is inherently abusive to the children. (divorcesource.com)
Even if unfounded allegations are made in the context of a tribunal, some believe them. (politics.co.uk)