A rejection letter is a written communication from an individual, company or organization to another indicating that their application, proposal, request, idea, etc. has been denied or rejected. It typically contains information about why the request was not granted and may offer suggestions for improvement in order to increase chances of success in future attempts. Rejection letters are often associated with job applications, grant proposals, funding requests, loan applications, manuscript submissions, and other situations where an individual or organization is seeking approval or support from another party.