A statement originally made outside of court and then repeated in the court as truth is called "hearsay".
Hearsay evidence is "an out-of-court proclamation offered to demonstrate reality of issue declared". In specific courts, noise proof is unacceptable (the "Hearsay Evidence Rule") except if an exemption to the Hearsay Rule applies.
Hearsay is declaration given amid a preliminary that did not depend on what the observer has straightforwardly observed, however rather on what the observer was told by others. Hearsay evidence is a feeble wellspring of proof, and is frequently denied in court.