Binance Options will now enforce a Self-Trade Prevention (STP) feature for all users.

Binance Mandates STP for Options Users Starting March 19—No More Accidental Self-Trades

Binance is tightening up. Starting March 19 at 14:00 UTC+8, all Options users will have Self-Trade Prevention (STP) forced on. The feature—already live for spot, margin, and futures—will now cover options too. Expect a one-hour system update to smooth the rollout.

What's STP? It stops API users from accidentally trading with themselves. Saves fees, keeps data clean, and blocks orders that would trigger self-trades. Three modes available; default for options is "EXPIRE_MAKER."