On what should the RFP cover letter be prepared?

The Request for Proposal (RFP) cover letter should be prepared on your company's letterhead because it serves several important purposes. Using your company's letterhead adds a professional touch and instantly provides the recipient with your company's identity, including your logo, address, and contact information. This professional presentation not only demonstrates your attention to detail but also reinforces your brand image and credibility in the eyes of the client.

Additionally, a cover letter formatted on letterhead indicates that you have taken the proposal seriously and have invested time and resources into the presentation. This helps create a positive first impression, which can be critical in competitive bidding situations. In contrast, using plain paper, email format, or third-party letterheads lacks the professional touch and brand recognition that your own letterhead provides. These alternatives may give the impression of a less formal or less serious approach, which could negatively impact the reception of your proposal.