California Codes, Civil Code - CIV, Division 3 — Obligations, Part 2 — Contracts, Title 2 — Manner of Creating Contracts, Section 1628
A corporate or official seal may be affixed to an instrument by a mere impression upon the paper or other material on which such instrument is written.
Notes
Allows a corporate or official seal to be affixed to an instrument by making a direct impression on the paper or other material on which the instrument is written. The permitted method is the impression itself, and the seal may be placed on the same material that carries the written instrument.
Use as reference
Lexinter.net | California Code, Civil Code - CIV § 1628 | https://laws.lexinter.net/codes/california/civil-code/division-3/part-2/title-2/section-1628