Sec. 406.013. SEAL.
(a) A notary public shall provide a seal of office that clearly shows, when embossed, stamped, or printed on a document, the words "Notary Public, State of Texas" around a star of five points, the notary public's name, the notary public's identifying number, and the date the notary public's commission expires. The notary public shall authenticate all official acts with the seal of office.
(b) The seal may be a circular form not more than two inches in diameter or a rectangular form not more than one inch in width and 2-1/2 inches in length. The seal must have a serrated or milled edge border.
(c) The seal must be affixed by a seal press or stamp that embosses or prints a seal that legibly reproduces the required elements of the seal under photographic methods. An indelible ink pad must be used for affixing by a stamp the impression of a seal on an instrument to authenticate the notary public's official act.
(d) Subsection (c) does not apply to an electronically transmitted authenticated document, except that an electronically transmitted authenticated document must legibly reproduce the required elements of the seal.

Frequently Asked Questions for Notaries Public
11. How long should I keep my record book?
A notary is required to keep, in a safe and secure manner, copies of the records of notarizations performed for the longer of: 1) the term of the commission in which the notarization occurred; or 2) three years following the date of notarization. 1 TAC §87.54. The best practice, however, would be for the notary to permanently maintain copies of the records.