Can You Use A Credit Card At An ATM Without a PIN?

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I've been looking into Can You Use A Credit Card At An ATM and one question that came up is whether a PIN is always required. Credit card cash withdrawals at ATMs generally require a PIN, although the exact process depends on the card issuer and ATM network. Some people may not know whether their credit card has a cash advance PIN already established. If someone has never used their credit card at an ATM, checking the card agreement or contacting the issuer seems like a good first step. Has anyone requested a cash advance PIN from their card company?