Looking to secure sponsorships for your organization? Download these sponsorship letter templates to help you write a successful sponsorship letter!As you begin writing letters, it's best to start with an introduction. Sponsorship Proposal Template - Free download as PDF File (. During this time, investigators may receive and convey to sponsors approval and determination letters with either name indicated. Group to fill the vacancy in Seat Number ___. The client still needs to provide the sponsor's name. They will complete form 09-99 USCIS Letter for Indigent Sponsored Noncitizen. 4. CocoDoc collected lots of free sample sponsorship request letter for our users. The client still needs to provide the sponsor's name.