This sub-series consists mainly of letters drafted and sent by the correspondence supervisor of the Leader of the Opposition while Stephen Harper held that office; however, a small number of files were created in 2007 and 2008 during Harper's first term as prime minister. Thank you letters were sent to acknowledge various activities, including: help and support during partisan events; support for the merging of the Progressive Conservative Party and the Canadian Alliance (resulting in the creation of the Conservative Party of Canada); and participation in the 2004 and 2006 election campaigns. The sub-series also contains contact lists and template letters related to the fundraising activities of the Conservative Party for the year 2005, as well as letters sent to defeated candidates for the 2004 election and defeated members of Parliament following the 2008 election. Also included is a blank volunteer 'certificate of appreciation' to be issued in the name of members of Parliament.
Party questionnaires sent by various interest groups for the 2008 election campaign, and postal cards sent by a broad range of Canadians as part of write-in campaigns, can also be found in this sub-series. The sub-series includes mail received in response to a call by the Canadian Catholic Organization for Development and Peace for an independent ombudsperson to monitor the activities of mining companies abroad (2008 - 420 cards received); and by the Armenian National Committee of Canada thanking the Prime Minister for recognizing the Armenian Genocide (2006 - approx. 1990 cards received). These documents reveal important matters and concerns in the Canadian society of the time.