The taxpayer mailed his 1988 corporate tax return by registered mail from the United States on June 30, 1989, and the return was received by the respondent on July 13, 1989. In finding that the taxpayer had not complied with the requirement in the Alberta Corporate Tax Act that the return be filed with the Provincial Treasurer by June 30, 1989, the Court of Appeal affirmed the finding of Rawlins J. that the word "filed" is "clear and unequivocal and connotes the requirement of actual delivery before filing and therefore a mailed document is not considered 'filed' until it is received and not at the point of mailing".