Texas Estates Code - EST § 113.251. Pledge of Account

(a) A party to a multiple-party account may pledge the account or otherwise create a security interest in the account without the joinder of, as applicable, a P.O.D. payee, a beneficiary, a convenience signer, or any other party to a joint account, regardless of whether a right of survivorship exists.

(b) A convenience signer may not pledge or otherwise create a security interest in an account.

(c) Not later than the 30th day after the date a security interest on a multiple-party account is perfected, a secured creditor that is a financial institution with accounts insured by the Federal Deposit Insurance Corporation shall provide written notice of the pledge of the account to any other party to the account who did not create the security interest. The notice must be sent by a qualified delivery method to each other party at the last address the party provided to the depository bank.

(d) The financial institution is not required to provide the notice described by Subsection (c) to a P.O.D. payee, beneficiary, or convenience signer.