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Blasphemous libel was originally an offence under the common law of England. Today, it is an offence under the common law of Northern Ireland, it is a statutory offence in Canada and New Zealand, and it has been abolished in England and Wales.
It consists of the publication of material which exposes the Christian religion to scurrility, vilification, ridicule and contempt, and the material must have the tendency to shock and outrage the feelings of Christians. It is a form of criminal libel.
In both Canada and New Zealand, it is not blasphemous libel for a person to express, in good faith and in decent language, or to attempt to establish by argument, in good faith and conveyed in decent language, an opinion on a religious subject.
It remains an offence in some Australian states and territories, although the Commonwealth and some states and territories have abolished it within their jurisdiction. For details, see blasphemy law in Australia.
Section 296 was formerly section 260 of the Criminal Code (R.S., c. C-34).
The Crown last prosecuted a charge of blasphemous libel in R. v. Rahard  3 D.L.R. 230 (Court of Sessions of the Peace, Quebec, 1935). In that case, the court adopted an argument that prosecutor E. J. Murphy had proffered in the case of R. v. Sperry (unreported) 1926. Mr. Murphy put the issue this way:
- The question is, is the language used calculated and intended to insult the feelings of and the deepest religious convictions of the great majority of the persons amongst whom we live? If so, they are not to be tolerated any more than any other nuisance is tolerated. We must not do things that are outrages to the general feeling of propriety among the persons amongst whom we live.
The words "calculated and intended to insult the feelings and the deepest religious convictions of the great majority of the persons amongst whom we live", which the court used, were adopted from the summing up of Lord Coleridge, LCJ. in R v Bradlaugh (1883) 15 Cox CC 217 at 230.
R. v. St. Martin (1933) 40 Rev. de Jur. 411 was also cited in R. v. Rahard. Cf. R. v. Kinler (1925) 63 Que. S.C. 483.
The Criminal Code of Canada prohibits hate speech that targets an "identifiable group", which includes a religious group. Canada's provinces and territories have human rights commissions or tribunals which can award compensation in matters of hate speech.
Section 296(3) of the Criminal Code provides:
No person shall be convicted of an offence under this section for expressing in good faith and in decent language, or attempting to establish by argument used in good faith and conveyed in decent language, an opinion on a religious subject.
There is a French text of this provision that is equally authentic.
Republic of Ireland
In the Republic of Ireland, §13 of the Defamation Act, 1961 prescribed penalties for blasphemous libel, but did not define the offence. The only attempted prosecution since the 1937 Constitution was in 1999; the Supreme Court ruled that the Constitution had extinguished the common law offence of blasphemous libel, since when "it is impossible to say of what the offence of blasphemy consists". The Defamation Act 2009 defines a new offence of "Publication or utterance of blasphemous matter", which was held to be required by Article 40.6.1.i. of the Constitution, which states "The publication or utterance of blasphemous, seditious or indecent matter is an offence which shall be punishable in accordance with law".
In New Zealand it is an offence under section 123 the Crimes Act 1961 to publish any blasphemous libel. The maximum punishment is one year imprisonment. No one can be prosecuted without the consent of the Attorney General.
Section 123(3) of the Crimes Act 1961 provides:
It is not an offence against this section to express in good faith and in decent language, or to attempt to establish by arguments used in good faith and conveyed in decent language, any opinion whatever on any religious subject.
England and Wales
In England and Wales, the common law offence of blasphemous libel was abolished on 8 July 2008 by the Criminal Justice and Immigration Act 2008, having been replaced with the Racial and Religious Hatred Act 2006.
- Tang, Colleen (21 July 2009). "Irish law makes it illegal to speak blasphemy". CBC News. Retrieved 23 July 2009.
- 48 Canadian Criminal Cases 1.
- The information on blasphemous libel in Canada comes from Tremeear's Annotated Criminal Code (published annually).
- The Law Commission. Offences against Religion and Public Worship. Working paper no. 79. 1981. para. 4.7 and note 181 at p. 46
- Defamation Act, 1961, Section 13 Irish statute book
-  4 IR 485,  1 ILRM 426,  IESC 5
- Defamation Act 2009, Section 36 Irish statute book
- Amending the Law on Blasphemous Libel Dermot Ahern, Dáil Committee on Justice, Equality Defence and Women's Rights, 20 May 2009