>>14881341 PB
Scot= tax, so
Scot free = tax free
"'Scot' as a term for tax has been used since then in various forms - Church scot, Rome scot, Soul scot and so on. Whatever the tax, the phrase 'getting off scot free' simply refers to not paying one's taxes.
No one likes paying tax and people have been getting off scot free since at least the 11th century. The first reference in print to 'scot free' is in a forged copy of the Writ of Edward the Confessor. We don't have a precise date for the forged version of the writ but Edward died in 1066 and the copy was made sometime in the 13th century."
https://www.phrases.org.uk/meanings/scot-free.html