Missing Fender Tag - Can I Get Tag Info From VIN ????

my 67 cuda had a fender tag but it didnt have a vin no the tag, is it supposed to match in any way with the vin number? I know some cars do I just didn't know if it was off another car (why would someone do a 225 slant 6 fender tag switch I don't know) just wondering, and how can I decode the fender tag?