Tex. Tax Code § 31.08

(a) At the request of any person, a collector for a taxing unit shall issue a certificate showing the amount of delinquent taxes, penalties, interest, and any known costs and expenses under Section 33.48 due the unit on a property according to the unit's current tax records. If the collector collects taxes for more than one taxing unit, the certificate must show the amount of delinquent taxes, penalties, interest, and any known costs and expenses under Section 33.48 due on the property to each taxing unit for which the collector collects the taxes. The collector shall charge a fee not to exceed $10 for each certificate issued. The collector shall pay all fees collected under this section into the treasury of the taxing unit that employs the collector.

(b) Except as provided by Subsections (c) and (d), if a person transfers property accompanied by a tax certificate that erroneously indicates that no delinquent taxes, penalties, or interest are due a taxing unit on the property or that fails to include property because of its omission from an appraisal roll as described under Section 25.21, the taxing unit's tax lien on the property, including, if applicable, the tax lien securing the payment of any delinquent taxes, penalties, or interest that are subsequently determined to be due the taxing unit on the property because a residence homestead exemption was erroneously allowed for the property and was subsequently canceled, is extinguished and the purchaser of the property is absolved of liability to the taxing unit for delinquent taxes, penalties, or interest on the property or for taxes based on omitted property. The person who was liable for the tax for the year the tax was imposed or the property was omitted remains personally liable for the tax and for any penalties or interest.

(c) A tax certificate issued through fraud or collusion is void.

(d) A tax certificate that accompanies a transfer of property and erroneously indicates that no delinquent taxes, penalties, or interest are due a taxing unit on the property because a residence homestead exemption was erroneously allowed for the property and was subsequently canceled does not extinguish the tax lien securing the payment of any delinquent taxes, penalties, or interest that are subsequently determined to be due the taxing unit on the property if the chief appraiser or the collector for a taxing unit determines that the transfer of the property occurred between:

(1) two individuals who are related within the first degree by consanguinity or affinity, as determined under Chapter 573, Government Code;

(2) an employer and an employee;

(3) a parent company and a subsidiary of that parent company; or

(4) a trust and a beneficiary of that trust.