Exhibit 99.1FORM 52-109FT2
CERTIFICATION OF INTERIM FILINGS
DURING TRANSITION PERIOD
I, William Linton, the President and Chief Executive Officer of Call-Net Enterprises Inc, certify that:
| 1. | I have reviewed the interim filings, as this term is defined in Multilateral Instrument 52-109 Certification of Disclosure in Issuer’s Annual and Interim Filings, of Call-Net Enterprises Inc., (the issuer) for the interim period ending March 31, 2005; |
| 2. | Based on my knowledge, the interim filings do not contain any untrue statement of a material fact or omit to state a material fact required to be stated or that is necessary to make a statement not misleading in light of the circumstances under which it was made, with respect to the period covered by the interim filings; and |
| 3. | Based on my knowledge, the interim financial statements together with the other financial information included in the interim filings fairly present in all material respects the financial conditions, results of operations and cash flows of the issuer, as of the date and for the periods presented in the interim filings. |
DATE: May 6, 2005.
/s/ William Linton_______________
Name: William Linton
Title: President and
Chief Executive Officer
FORM 52-109FT2
CERTIFICATION OF INTERIM FILINGS
DURING TRANSITION PERIOD
I, Roy Graydon, the Executive Vice President and Chief Financial Officer of Call-Net Enterprises Inc, certify that:
| 1. | I have reviewed the interim filings, as this term is defined in Multilateral Instrument 52-109 Certification of Disclosure in Issuer’s Annual and Interim Filings, of Call-Net Enterprises Inc., (the issuer) for the interim period ending March 31, 2005; |
| 2. | Based on my knowledge, the interim filings do not contain any untrue statement of a material fact or omit to state a material fact required to be stated or that is necessary to make a statement not misleading in light of the circumstances under which it was made, with respect to the period covered by the interim filings; and |
| 3. | Based on my knowledge, the interim financial statements together with the other financial information included in the interim filings fairly present in all material respects the financial conditions, results of operations and cash flows of the issuer, as of the date and for the periods presented in the interim filings. |
DATE: May 6, 2005.
/s/ Roy Graydon________________
Name: Roy Graydon
Title: Executive Vice President &
Chief Financial Officer
