What the batch code can tell you
For Charlotte Tilbury, the batch code can support a freshness check and help you compare whether a seller's stock looks unusually old.
It can also help identify obvious mistakes, such as a claimed new release with a very old production window.
What it cannot prove
A batch code cannot verify the full supply chain, storage conditions, tamper history, or whether a seller is authorized.
A counterfeit product may carry a copied code, and a genuine product may still be unsuitable if it was badly stored or opened.
A better buying-risk workflow
Use the Charlotte Tilbury checker first, then compare packaging print quality, seller history, price realism, return policy, and whether the code appears consistently on box and product.
If the product may be unsafe, stop using it and contact the brand or retailer with clear photos of the code and packaging.
Charlotte Tilbury product and package comparison notes
Mascara and liquid liner carry repeated eye-area contact, lipstick touches skin directly, and jar cream is repeatedly opened. Each needs its own PAO and hygiene assessment.
Write the opening month on eye products and avoid pumping mascara or adding liquid to revive dried makeup.