Ever worry about mixing a 144A CUSIP with a Reg S ISIN—or sending investors to the wrong clearing system? In this lesson, you’ll learn to map codes to audiences and tranches precisely, and write clean, compliant settlement instructions for DTC, Euroclear, and Clearstream. Expect concise explanations, real deal examples and dialogue, plus targeted exercises (MCQs, fill‑in‑the‑blank, error fixes) to lock in accuracy. Finish ready to draft term sheets, roadshows, and pricing notices that are clear, compliant, and operationally bulletproof.