Texas Attorney General Opinion, KP-1065, finds that affidavits of adverse possession should be filed by county clerks.
What standard does the affidavit need to meet? It must meet the requirements of Property Code section 12.001(a) : acknowledged, sworn to with a proper jurat, or proved according to law.
What does the affidavit not need to do? The affidavit is not proof that adverse possession has legally occured.