Dear Mike, This is Eunice from JLCPCB. Thanks for your support to our service. So sorry for the possible delay caused to your project.  Have you solved your problem? As for the serial number of us, generally if there is no special requirement from customer, we will add the number according our production preference. And there is a specification on our website about how to inform JLC team to put the JLC number into the difinite position:[https://support.jlcpcb.com/article/28-how-to-put-jlc-production-id-at-a-specified-area-on-the-pcb](https://support.jlcpcb.com/article/28-how-to-put-jlc-production-id-at-a-specified-area-on-the-pcb). BTW, in order to avoid possible problem happen again, please leave us a remake when you place the order to take care of the special requirement. And if there is any production or order issue, please contact with our service team  [support@jlcpcb.com](mailto:support@jlcpcb.com), they will response quickly to solve your problem . It will be more efficient than forum question feedback. Apologize for the problem caused to you again, hope you can keep using our service and give us feedback. We will try to be more better for every customer. Best Regard Eunice Yin JLCPCB team

Hello @MikeDB, Did you put the "JLCJLCJLCJLC" on the board ? (I don't this this on your photo) Did you put a remark on comment at order time ?

@rom1nux Yes, you are correct. Put the "JLCJLCJLCJLC" on the board to specify the place you want us to put JLC serial number and then please do remember to leave us a note about that when you place the order.