UNUM Corporation and Subsidiaries Form 10-Q June 30, 1997 EXHIBIT 15 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, DC 20549 We are aware that our report dated July 23, 1997, on our review of interim financial information of UNUM Corporation for the three month and six month periods ended June 30, 1997, and 1996, and included in the Company's quarterly report on Form 10-Q for the quarters then ended is incorporated by reference in the following Registration Statements: o Form S-8 No. 33-31270 pertaining to the UNUM Employees Retirement Savings Plan and Trust o Form S-8 No. 33-19090 pertaining to the 1987 Executive Stock Option Plan o Form S-8 No. 33-38225 pertaining to the 1990 Long-Term Stock Incentive Plan o Form S-8 No. 33-52741 pertaining to the 1990 Long-Term Stock Incentive Plan o Form S-3 No. 33-36873 o Form S-3 No. 33-69132 o Post-Effective Amendment No. 1 on Form S-8 to Registration Statement on Form S-4 No. 33-55870 o Form S-3 No. 333-08187 Pursuant to Rule 436 (c) under the Securities Act of 1933, this report should not be considered a part of the registration statements prepared or certified by accountants within the meaning of Sections 7 and 11 of that Act. /s/ COOPERS & LYBRAND L.L.P.