“11. Illegality or irregularity resulting in prejudice and failure of justice is embedded in broader considerations of justice that cannot be reduced to a set formula of words or rules but could be said to be offending natural justice and not curable. A man must know what offence he is being tried for and he must be told in clear and unambiguous terms and it must all be explained to him so that he really understands the accusations. Only in such cases, the question of curing the omission, irregularity or error will arise ( Willie Slaney v. State of Madhya Pradesh1956 S.C. 119 ). If in substance, though not in form, the accused was made to understand the real charge and no prejudice resulted, then no error, omission or irregularity on the charge will be material. If he is tried for one offence and convicted for an entirely different offence brought out during trial; for which he had no opportunity to defend himself, prejudice and failure of justice is patent. The prosecution case is only that pursuant to a demand made by the appellant on 20.3.1985 to PW 1 for ₹ 200/- as motive or reward for passing indent in her favour, he received ₹ 150/- from her on 27.3.1985 as illegal gratification. That case is not only not proved, but also stands disproved. There is no evidence of such a demand or receipt of an amount pursuant to such a demand for that purpose. Demand and receipt for that purpose stand disproved by the mere fact that PW 1 was asked to produce the records and the children for physical verification and she failed and that is the reason why the indent was not passed. That fact acts as a motive for false implication as suggested by the defence and practically admitted by the Special Judge. Payment of ₹ 150/- on 27-3-1985 and its receipt by the appellant are admitted and proved. But the evidence is that it is a voluntary payment as a donation to the Association, of which the appellant is an ofÏce-bearer entrusted with the charge of collection. He may or may not have demanded such a donation. There is no evidence for that. Neither the prosecution nor PW 1 has a case in which the appellant demanded ₹ 150/- and PW 1 paid the same by way of motive or reward for passing indent. The appellant was never asked to answer the charge that he demanded