"If the merchant detects a double spend, it is a fraud. The merchant has the legal right to detain the client in many countries and have the authorities take them off, just as is the case with shoplifters right now. This is before the client even received the goods. They can at this point be legally arrested for a larceny, and it is the same as when a person has attempted to pass a bad cheque."

Pag. 128
Satoshi's Vision:
The Art of Bitcoin.
By Craig Wright
August 2019
https://t.me/theArtofBitcoin

https://www.amazon.com/Satoshis-Vision-Bitcoin-Craig-Wright/dp/1688735925