How lot numbers work

Each sellable size shows the lot that is shipping now. The lot id is the last line in the buy box, and it is the name of the certificate file.

When one lot reaches zero vials, the next lot number becomes the one on the page, and its own certificate replaces the previous file. Older files stay available from the testing table.

A listing with stock but no file is marked certificate pending and cannot be added to the cart. A listing with a file and zero vials stays visible as sold out.