Every document subject to tax which is submitted for recordation shall show on the face of the document the amount of tax due and the incorporated or unincorporated location of the lands, tenements or other realty described in the document. If the party submitting the document for recordation so requests, the amount of tax due shall be shown on a separate paper which shall be affixed to the document by the recorder after the permanent record is made and before the original is returned as specified in Section 27321 of the Government Code. This declaration of the amount of tax due must be signed by the party determining the tax or his agent, and the recorder may rely upon said declaration, provided he has no reason to believe that the full amount of the tax due has not been paid. The declaration of the amount of tax due shall include a statement that the consideration or value from which the tax due was computed was, or that it was not, exclusive of the interest or property conveyed at the time of sale. (Prior gen. code § 2-31.03)