Sample Fundraising Letter - Request For a Raffle Prize Sample Fundraising Letter Request For A Raffle Prize. Most companies will also need at least 6 weeks to turn around a request so send you letter in in plenty of time. This is particularly true in the run up to Christmas when every school in the country is after something for their Winter Fundraisers.School Fundraising · Fundraising Letters Sample sales letter for tickets to fundraising raffle Letters to Donors. Letters to donors are letters written to people who have donated something, especially money, voluntarily to a fund or charity. Usually, these are fundraising letters to invite donors to fundraisers or thank-you letters to express gratitude and appreciation for donations.