Yellow stick with barcode

Hey guys.

Can someone tell me what this sticker is for. It stis on the left side under the front wing

https://drive.google.com/file/d/1K6yNPja0eCNlpp1e4DoqdZMG_7i7mUVc/view?usp=sharing

my golf 3 from 97 have it.
but my other golf 3 from 93 dont have one


/Simon

 

It’s like the boot build sticker, with fewer details.

I should have the paint code on and part of the chassis number too.

 

ah okay. then i will remove it for when i do a new paint on the car