Do Apple screen display panels have a serial number?

I sold an Apple LCD panel from a 16-inch MacBook Pro on eBay and now the guy's sending me pictures claiming that it has "burn marks"

As will all items over $500, I marked it near the cables and filmed the entire procedure from removing the screen, testing it, then packaging it.

THERE'S NO WAY I sent him a screen with burn marks... He either &&^&@@ it up (in which I can do nothing about) or he's trying to pull a fast one on me.

I need to make sure that he returns MY PRODUCT and not his own old broken screen, so I'm wondering if the screens are serialized and how to get the number off of it.

About 10 years ago..., I swapped a genuine Apple screen for another on a 2011 15" MacBook and when the logic board crashed, I took it to get replaced under the "Extended Warranty Program" only to be DENIED by the genius. What was his justification? He claimed that someone's installed an "aftermarket screen". Now, this was a genuine screen, but that's besides the point. He KNEW it wasn't the original screen, and had been replaced. MY QUESTION IS: If I reinstall this panel back into the computer, how can I tell if it's the original screen?