Letter of Intent
From Bilat-Wiki
Some ICs request prospective applicants to submit letters of intent prior to the submission of a grant application. The letter usually includes the name, address and phone number of the PI, identifies other key personnel and participating institutions, and the RFA or PA identification. Although a letter of intent is not required, is not binding, and does not enter into the review of a subsequent application, the information that it contains allows institute staff to estimate the potential review workload and plan for the application.