L/C at sight is safer for the buyer, period. The supplier's bank only releases payment against compliant shipping documents. If the goods aren't shipped, the documents don't exist, and your money doesn't move. The downside is bank fees (0.1–0.3% of the L/C value) and administrative overhead — the supplier needs to produce documents that exactly match the L/C terms, and even small discrepancies can delay payment.
T/T 30/70 is the industry standard and faster, but your 30% deposit is at risk if the supplier disappears. For a first order over $20,000–50,000, an L/C at sight is worth the bank fees. For smaller orders, T/T 30/70 with a supplier you've verified (third-party audit, reference calls, business license check) is the pragmatic choice. Never pay 100% upfront on anything larger than a sample order — that's not industry practice, and any supplier asking for it should raise a flag.
We accept both T/T (30/70 standard) and L/C at sight. For our take on the full procurement process, see our import guide.