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Shift4 (NYSE: $FOUR) is bringing USDT (CRYPTO: $USDT) into its crypto checkout product, giving merchants a stablecoin payment option that still settles like a traditional sale.

The commerce technology company said Thursday it has partnered with Lydian to expand Pay with Crypto, its checkout product that lets customers pay from major wallets while merchants receive local-currency settlement. The structure keeps the merchant side familiar: no direct handling of digital assets, no new crypto workflows and no balance-sheet exposure to token volatility.

The addition of Tether’s USDT gives Shift4 another way to position crypto payments as payment infrastructure rather than a speculative add-on. USDT remains one of the most used stablecoins in global crypto markets, and its role in merchant checkout has become more important as payment companies look for ways to turn stablecoin activity into everyday transaction flow.

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Shift4 said Pay with Crypto is already live across thousands of merchants in the United States. CEO Taylor Lauber said the company built the product because crypto is becoming a mainstream payment method, adding that USDT support expands the program without adding complexity or risk for merchants.

Lydian provides the settlement layer behind the update. The company, backed by Tether and Cantor Fitzgerald, offers digital asset payment infrastructure that converts stablecoin payments into same-day local-currency settlement and removes volatility and compliance risk from the merchant side.

Lydian CEO Carl Grimstad said the goal is to make crypto function “exactly like traditional payments at checkout,” a line that captures where stablecoin payments are moving: less visible to the merchant, but more useful inside the payment stack.

For Shift4, the partnership extends a broader payments push at a time when stablecoins are becoming a settlement tool for companies beyond crypto-native exchanges. The business case is simple: let customers pay with digital dollars while merchants receive the money in the format they already understand.

Shift4 Payments, Inc. (NYSE: FOUR) is currently trading at $41.82 U.S. per share.