Texas Local Government Code - LOC GOV'T § 130.003. Payment Conditional

(a) The acceptance of a check or credit card invoice for the payment of a fee or tax does not constitute payment of the fee or tax. The fee or tax is not considered paid until the check is honored by the bank on which the check is drawn or the credit card invoice is honored by the issuer.

(b) This section does not prohibit a county tax assessor-collector from issuing receipts, license plates, certificates, or other instruments on the receipt of a check or credit card invoice, but the issuance is conditional on the payment of the check by the drawee bank or the honoring of the credit card invoice by the credit card issuer.