How To Write A Business Letter Requesting A Donation . Maintain utmost politeness, empathy, and respect. This will come in handy for the institution that may want to send you a receipt or an acknowledgement letter. Fundraising Made Effortless with 13 Donation Request Letters from learn.ally360.com If you are writing on behalf of an organization, it will be considered a personal donation letter. It can be written to request donations from either an individual or organization. Begin by introducing your organization.