The short answer
Understand the system before choosing an action.
Debt validation commonly refers to rights and procedures involving information a debt collector must provide and a consumer may request or dispute under applicable law. The exact rights, deadlines, required content, and effect of a request depend on the facts, the party involved, the communication, jurisdiction, and current law.
Financial Learning Cafe explains the subject. Your current agreement, official sources, facts, jurisdiction, and appropriately qualified professionals control the decision.