Per the Form 3115 instructions,"For an automatic change request, the filer must send a signed and dated copy of the Form 3115 to the IRS National Office and/or Ogden, UT, office and, in some cases, to an additional IRS office. For each of these copies, submit either the copy with an original signature or a photocopy of the original signed Form 3115. The Form 3115 attached to the income tax return (including any additional statements) does not need to be signed."