1) A Certificate of Write-In Candidacy for President and Vice-President (1 form). This form contains 12 spaces for the names, addresses, and signatures of the 12 electors. So each of the electors must put their name, address and signature on this form.

2) 12 Elector Registration Certificates (1 for each of the candidate’s 12 presidential electors) These forms must be physically taken in by each elector to their local voter registrar’s office, and must be signed or stamped by the voter registrar certifying that the elector is a registered voter.

These forms can be obtained by contacting the Elections Division at: (617) 727-2828

Secretary of the Commonwealth
Elections Division
McCormack Building, Room 1705
One Ashburton Place
Boston, MA 02108

The following is from:
http://www.sec.state.ma.us/ELE/elepres/presidx.htm

“Write-in candidates may also run, but only if their names and their slate of elector candidates have been filed by Friday, September 5, 2008 with the Secretary of the Commonwealth.”

“For elector candidates pledged to write-in or sticker candidates:

Write-in or sticker candidates for president and vice-president select their own elector candidates. These twelve names, with the written acceptance of the elector candidates, are filed with the Secretary of the Commonwealth at least 60 days before the date of the election. M. G. L. c. 54, § 78A (2004 ed.). Therefore, the final filing deadline with the Secretary of the Commonwealth is no later than 5:00 p.m. on Friday, September 5, 2008.”