EXHIBIT 99.12 FORM OF ENROLLMENT/CHANGE FORM JUNO ONLINE SERVICES, INC. 1999 EMPLOYEE STOCK PURCHASE PLAN ("ESPP") ENROLLMENT/CHANGE FORM - ---------- SECTION 1: Action Complete Sections: - ---------- -------------------------------- --------------------------- ACTIONS |_| New Enrollment 2, 3, 6, 7 and sign attached Stock Purchase Agreement |_| Payroll Deduction Change 2, 4, 7 |_| Terminate Payroll Deductions 2, 5, 7 |_| Leave of Absence 2, 6, 7 ================================================================================ - ---------- SECTION 2: Name - ---------- ------------------------------------------------------------- PERSONNEL Last First MI Dept. DATA Home Address -------------------------------------------- Street -------------------------------------------- City State Zip Code Social Security #|_|_|_| - |_|_| - |_|_|_|_| - ----------====================================================================== SECTION 3: Effective with the Purchase - ---------- Interval Beginning: Payroll Deduction Amount: ____% of cash earnings* NEW |_| February 1, _______ ENROLLMENT |_| August 1, _______ * Must be a multiple of 1% up to |_| Initial Offering Period a maximum of 15% of cash earnings ================================================================================ - ---------- SECTION 4: Effective with the I authorize the - ---------- Pay Period Beginning: ___________________ following new level of PAYROLL Month, Day and Year payroll deduction: __% DEDUCTION of cash earnings CHANGE * Must be a multiple of 1% up to a maximum of 15% of cash earnings NOTE: You may reduce your rate of payroll deductions once per ---- 6-month purchase interval to become effective as soon as possible following the filing of the change form. You may also increase your rate of payroll deductions to become effective as of the start date of the next 6-month interval (February 1 or August 1). ================================================================================ - ---------- SECTION 5: Effective with the Your election to - ---------- Pay Period Beginning: ___________________ terminate your payroll TERMINATE Month, Day and Year deductions for the PAYROLL balance of the DEDUCTIONS offering period cannot be changed, and you may not rejoin the offering period at a later date. You will not be able to resume participation in the ESPP until the start of the next offering period. In connection with my voluntary termination of payroll deductions, I elect the following action regarding my ESPP payroll deductions to date in the current purchase interval: |_| Purchase shares of Juno Online Services, Inc. on next scheduled purchase date OR |_| Refund ESPP payroll deductions collected NOTE: If your employment terminates for any reason or your ---- eligibility status changes (<20 hrs/wk or <5 months/yr), you will immediately cease to participate in the ESPP, and your ESPP payroll deductions collected in that purchase interval will automatically be refunded to you. ================================================================================ - ---------- SECTION 6: In connection with my leave of absence, I elect the following - ---------- action with respect to my ESPP payroll deductions to date: LEAVE OF ABSENCE |_| Purchase shares of Juno Online Services, Inc. on next scheduled purchase date OR |_| Refund ESPP payroll deductions collected NOTE: If you take an unpaid leave of absence, your payroll deductions will immediately cease. If you return to active status within 90 days after the start of your leave, your payroll deductions will at that time automatically resume at the rate in effect for you when your leave began. ================================================================================ - ---------- SECTION 7: - ---------- AUTHORIZATION _________________________________ ______________________________________ Date Signature of Employee