The Division of Market Oversight and the Division of Clearing and Risk are issuing a no-action letter that provides relief similar to that provided in No-Action Letters 13-66 and 14-50 by permitting swap execution facilities (SEFs) and designated contract markets (DCMs) to address clerical or operational errors that cause a swap to be rejected from clearing. The relief provided in this letter also permits SEFs and DCMS to address clerical or operational errors discovered after a swap has been cleared.