Ark. Code Ann. § 9-26-303

A minor, who has transferred a security, received or empowered others to receive dividends, interest, principal, or other payments or distributions, voted or given consent in person or by proxy, or made an election or exercised rights relating to the security, has no right thereafter, as against a bank, broker, issuer, third-party, or transfer agent to disaffirm or avoid the transaction, unless prior to acting in the transaction the bank, broker, issuer, third-party, or transfer agent against whom the transaction is sought to be disaffirmed or avoided had received notice in the office acting in the transaction that the specific security is held by a minor or unless an individual conducting the transaction for the bank, broker, issuer, third-party, or transfer agent had actual knowledge of the minority of the holder.