§ 8206 Incomplete Security Certificate Enforcement

• •If a paper showing ownership (like a stock certificate) is missing some info but has the right signatures, someone can fill in the missing parts if they have permission.
• •Even if the missing parts are filled in wrong, the person who buys it without knowing about the mistake can still use it.
• •If someone changes the paper on purpose or by mistake after it's already complete, the original info still counts.

You buy a stock certificate from someone, but later find out that the number of shares was filled in wrong by the seller.

If you didn’t know about the mistake when you bought it, you can still use the certificate as if the wrong info was correct.