What are the reasons for invalidating the giving of testimony before the judiciary?

Among the factors that invalidate a witness's testimony are: establishing their immorality (fisq), their involvement in matters that compromise their integrity (muru'ah), or if their testimony contains anything that might lead to an accusation of falsehood; such as the testimony of a relative for a relative, or a friend for a friend, or against an enemy, or if it involves bringing benefit or averting harm, or testifying about something that one could not possibly have knowledge of.