These days you buy things using an electronic pad at a supermarket or from your insurance agent.  This electronic image is an example.

Following is an excerpt from the Texas PE Law:
SUBCHAPTER B: SEALING REQUIREMENTS
§137.35 Electronic Seals and Electronic Signatures
(a) Licensed professional engineers shall maintain the security of their electronic seals and electronic signatures. The following methods are allowed:
(1) Licensed professional engineers may electronically copy their original hard copy work that bears their seal, original signature, and date and transmit this work in a secure electronic format.
(2) An engineer may create an electronic seal and electronic signature for use in transmitting electronically formatted engineering work, regardless of whether the work was originally in hard copy or electronic format.
(b) As an alternative to electronic sealing and electronic signatures, engineers shall affix their original seals and signatures and date to their engineering work as specified in §137.33(f) of this chapter (relating to Sealing Procedures).
Source Note: The provisions of this §137.35 amended to be effective April 27, 2008.

We used to use test reports with a signature that is printed when the forms are printed.  In our case it is the QA manager who is also lab supervisor.

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