Identity invalidation refers to the process in which an individual's self-identification or cultural background is dismissed, undermined, or negated by others. This can occur through microaggressions, stereotypes, or outright discrimination, leading individuals to feel that their identities are not recognized or valued. Such invalidation is particularly impactful for those with bi-racial or multi-ethnic identities, as they may face unique challenges in having their identities acknowledged and respected by both dominant and marginalized groups.