Certifications - -------------- I, Charles E. Porter, a Principal Executive Officer of the funds listed on Attachment A, certify that: 1. I have reviewed each report on Form N-CSR of the funds listed on Attachment A: 2. Based on my knowledge, each report does not contain any untrue statements of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by each report; 3. Based on my knowledge, the financial statements, and other financial information included in each report, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in each report; 4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have: a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which each report is being prepared; b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; c) evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of each report based on such evaluation; and d) disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and 5. The registrant's other certifying officer and I have disclosed to each registrant's auditors and the audit committee of each registrant's board of directors (or persons performing the equivalent functions): a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect each registrant's ability to record, process, summarize, and report financial information; and b) any fraud, whether or not material, that involves management or other employees who have a significant role in each registrant's internal control over financial reporting. /s/Charles E. Porter Date: March 28, 2005 - ---------------------- ---------------------- Charles E. Porter, Principal Executive Officer Certifications - -------------- I, Steven D. Krichmar, the Principal Financial Officer of the funds listed on Attachment A, certify that: 1. I have reviewed each report on Form N-CSR of the funds listed on Attachment A: 2. Based on my knowledge, each report does not contain any untrue statements of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by each report; 3. Based on my knowledge, the financial statements, and other financial information included in each report, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in each report; 4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have: a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which each report is being prepared; b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles; c) evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of each report based on such evaluation; and d) disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and 5. The registrant's other certifying officer and I have disclosed to each registrant's auditors and the audit committee of each registrant's board of directors (or persons performing the equivalent functions): a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect each registrant's ability to record, process, summarize, and report financial information; and b) any fraud, whether or not material, that involves management or other employees who have a significant role in each registrant's internal control over financial reporting. /s/Steven D. Krichmar Date: March 28, 2005 - ---------------------- ---------------------- Steven D. Krichmar, Principal Financial Officer Attachment A - -------------- Period(s) ended January 31, 2005 001 The George Putnam Fund of Boston 003 Putnam Investors Fund 006 Putnam Vista Fund 007 Putnam Voyager Fund 024 Putnam OTC & Emerging Growth Fund 035 Putnam ATM_Free Insured Municipal Fund 036 Putnam Tax-Free High Yield Fund 073 Putnam Premier Income Trust 2AP Putnam Growth Opportunities Fund 2AQ Putnam Research Fund 48P Putnam RetirementReady Funds