Defamation Act

United Kingdom:
 * Defamation Act 1952 (15 & 16 Geo. 6 and 1 Eliz. 2 c. 66), an UK Act of Parliament that updates defamation and libel law and provides for consequential defence.
 * Defamation Act 1996 (c. 31), an UK Act of Parliament that further updates defamation and libel law, provides for summary disposal and relief of related lawsuits, and make court proceedings and certain statement free from defamation and libel lawsuits.
 * Defamation Act 2013 (c. 26), an UK Act of Parliament that introduces the serious harm requirement for defamation lawsuits, provides for fresh defences, court procedures, and repeals the Slander of Women Act 1891.

Australia:
 * Defamation Act 2001 (Australian Capital Territory)
 * Defamation Act 2005 (New South Wales)
 * Defamation Act 2005 (Queensland)
 * Defamation Act 2005 (South Australia)
 * Defamation Act 2005 (Tasmania)
 * Defamation Act 2005 (Victoria)
 * Defamation Act 2005 (Western Australia)

Ireland:
 * Defamation Act 2009 (No. 31 of 2009)

Malaysia and Singapore:
 * Defamation Ordinance, 1957 [F.M. Ordinance 20/1957], an ordinance enacted by the Federal Legislative Council of Malaya relating to similar issues. Later revised in Malaysia as Defamation Act 1957 [Act 286] and Defamation Act 1957 in Singapore.

New Zealand:
 * Defamation Act 1992 (1992 No. 105)