Written requests that ask a party to admit or deny a specific fact or application of law. Each party is presumed entitled to serve up to twenty requests for admission on the adverse party unless otherwise modified. [C.R.C.P. 26(b)(2)]. Once an RFA is served, the party has thirty-five days to respond. If the served party fails to answer, the admission is deemed admitted. Typically, RFA is used to narrow the issues that need to proceed to trial because if the fact is admitted, it is not at issue.