Judicial notice is an exception to the rule of forma proof that requries parties to present evidence to establish all facts in a trial. It permits a court to rely upon facts that are not supported by evidence on the court record.
A Judge accept something as fact thereby exempting the requirement to present evidence to establish the fact where:
- the fact is so notorious or generally accepted as not to be the subject of debate among reasonable persons; or
- the fact is capable of immediate and accurate demonstration by resort to readily accessible sources of indisputable accuracy
Natural justice requires that the judge notify counsel when he is taking judicial notice of fact.
The improper taking of judicial notice is reviewed as a misapprehension of evidence. 
A judge should be cautious in finding facts based on judicial notice since they are not proven by evidence under oath or tested by cross-examination.
It can be dangerous and potentially unfair to take judicial notice based on written materials only.
More stringent proof should be required for "facts that are close to the center of the controversy between the parties (whether social, legislative or adjudicative) as distinguished from background facts at or near the periphery."
There are inherent dangers in taking judicial notice of social matters where there is not a sufficient underlying record.
In establishing a basis for judicial notice, social science evidence should be presented through an expert witnesses that can be cross-examined.
Findings of social and legislative facts by way of judicial notice are to be reviewed no differently than any other conclusion of fact.
- R v Daley, 2008 NBQB 21 (CanLII), at para 15 citing McWilliams Canadian Criminal Evidence
- Daley at para 15
R v Potts, 1982 CanLII 1751 (ONCA), (1982), 66 CCC (2d) 219 (Ont. C.A.)
J. Sopinka, S. N. Lederman and A. W. Bryant, The Law of Evidence in Canada (2nd ed. 1999), at p. 1055
R v Find, 2001 SCC 32 (CanLII),  1 SCR 863 at para 48
R v Williams 1998 CanLII 782, (1998) 124 CCC (3d) 481 at p. 489
R v Spence, 2005 SCC 71,  3 SCR 458, at para 53
- R v Haines,  5 W.W.R. 421 at 429, 20 B.C.L.R. 260, 52 CCC (2d) 558(*no link)
("it is clearly contrary to the rules of natural justice for a judge to rely on information obtained after the hearing was completed without disclosing it to the parties and giving them an opportunity to meet it.")
Pfizer Co. Ltd. v Deputy Minister of National Revenue, 1975 CanLII 194 (SCC),  1 SCR 456
- R v Charles, 2013 BCSC 23 (CanLII) at para 36
R v Find at para 48
R v King, 2013 ABCA 3 (CanLII) at para 14
- R v Spence at para 60
R v Bjornson, 2012 ABCA 230 (CanLII), 536 AR 1, at para 8
R v King at paras 14 to 22
R v Sam, 2013 ABCA 174 (CanLII)
- Spence, supra at para 68
Canada (Attorney General) v Bedford, 2013 SCC 72 (CanLII) at paras 48 to 53
Permissible Examples of Judicial Notice
Location of Cities
A judge may take judicial notice of the location of cities for the purpose of establishing the jurisdiction of an offence.
Alcoholic spirits have been acknowledge as being intoxicating. However, notice cannot be taken on the degree of intoxication due to the consumption of certain amounts of alcohol upon certain body types or persons.
Authoritative references books, almanacs, atlases, calendars, charts, textbooks, dictionaries, encyclopedia, historical documents, maps, reference works, scientific tables and the internet, can often be a source of judicial notice.
Wikipedia or similar sites to not necessarily contain accurate information to take judicial notice fact.
The judge may access the internet in order to consult with online maps such as Google maps.
Use of the internet by the trial judge to consult commercial information, conduct outside of the courtroom is not appropriate.
Cellphone Towers and Cell phones
A judge may take judicial notice that cell phone was within a general vicinity of a cell tower recording a signal from the phone and that a travel route can be estimated based on the records of several towers. The court may also find as fact that a call from a cell phone is likely to register at the tower closest to the caller without taking expert evidence.
Notice may be taken of expressions and certain slang.
A Court may recognize its prior orders through judicial notice without the need to provide a certified copy of the prior order.
e.g. R v Bednarz,  30 CCC 398(*no link)
R v Kuhn, (1970) 1 CCC (2d) 132(*no link)
R v Thorburn, 2012 BCPC 323 (CanLII)
R v Purcell (1975) 24 CCC (2d) 139, (NSCA)(*no link) - judge erred in not concluding that "police station" referred to the station in Halifax, NS
R v Hayes (1924), 43 CCC 398 (Ont. C.A.)(*no link) at 400-1
McCormick v Greater Sudbury Police Service, 2010 ONSC 270 (CanLII) at para 129
McCormick v Greater Sudbury Police Service at para 129
R v Letford, 2000 CanLII 17024 (ONCA) at para 22
R v Ostrowski, 1958 CanLII 102 (ON SC), (1958), 122 CCC 196 (Ont. H.C.) at 196-7
R v Khan, 2017 ABPC 101 (CanLII), at para 42 citing McWilliams, Judicial Notice, Indisputable Sources Option, 26:30, 50 pp 26 – 26 – 26 - 29)
- R v Balen, 2012 ONSC 2209 (CanLII) at 61
- R v Calvert, 2011 ONCA 379(*no link) at 2-8
Generally: United States of America v Saad 2004 CanLII 9931 (ON CA), (2004), 183 CCC (3d) 97 (Ont. C.A.), at p. 110 (leave to appeal refused,  S.C.C.A. No. 232)
Ardoch Algonquin First Nation v Canada (Attorney General), 2003 FCA 473 (CanLII),  2 FCR 108 at para 16
AstraZeneca Canada Ltd. v Apotex Inc., 2003 FCA 487 (CanLII), (2003), 30 C.P.R. (4th) 431 (F.C.A.), at paras 6-14
R v Whittaker, 2001 ABQB 873 (CanLII), (2001), 301 A.R. 136 (Q.B.), at para 25
- R v Ranger 2010 ONCA 759 (CanLII)
R v Hamilton, 2011 ONCA 399 (CanLII), 271 CCC (3d) 208, at paras 259, 277, and 279
Any more precise triangulation may require expert opinion, see Hamilton, at para 280; Ranger at para 17
R v Rennehan, 2005 NSSC 370 (CanLII) - a "pickup" means a type of vehicle
R v MacAulay (1975), 11 N.B.R. (2d) 44. 25 CCC (2d) 1 (NBSCAD)(*no link) - "O.D'd" means to overdose
R v O'Brien, 1987 CanLII 1162 (QC CA) - "hash" was short for "hashish" which is a name for canabis resin
- R v Tysowski, 2008 SKCA 88 (CanLII)
Section 17 and 18 of the Canada Evidence Act requires judicial notice be taken of the laws of Canada, the provinces, the United Kingdom, as well as federal and provincial orders in council.
Imperial Acts, etc.
17. Judicial notice shall be taken of all Acts of the Imperial Parliament, of all ordinances made by the Governor in Council, or the lieutenant governor in council of any province or colony that, or some portion of which, now forms or hereafter may form part of Canada, and of all the Acts of the legislature of any such province or colony, whether enacted before or after the passing of the Constitution Act, 1867.
R.S., c. E-10, s. 17.
Acts of Canada
18. Judicial notice shall be taken of all Acts of Parliament, public or private, without being specially pleaded.
R.S., c. E-10, s. 18.
Similarly, s. 781 of the Code states:
Want of proof of order in council
781. (1) No order, conviction or other proceeding shall be quashed or set aside, and no defendant shall be discharged, by reason only that evidence has not been given
- (a) of a proclamation or order of the Governor in Council or the lieutenant governor in council;
- (b) of rules, regulations or by-laws made by the Governor in Council under an Act of Parliament or by the lieutenant governor in council under an Act of the legislature of the province; or
- (c) of the publication of a proclamation, order, rule, regulation or by-law in the Canada Gazette or in the official gazette for the province.
(2) Proclamations, orders, rules, regulations and by-laws mentioned in subsection (1) and the publication thereof shall be judicially noticed.
R.S., c. C-34, s. 715.
In the absence of an express statutory provision an official document or proclamation, including regulations and by-laws, will need to be validated by some means of proof. 
R v Khan, 2017 ABPC 101 (CanLII), par. 37 - citing Bryant, "Law of Evidence", 3rd Ed. s.19.36 at p.1276
Impermissible Facts of Judicial Notice
It is impermissible to take judicial notice of the following: