I've encountered this resistor
R12 while trying to understand how a board is working. It seems to be much bigger than the other SMT components and basically just looks like a flat metal tile without symbols.
Do these kind of resistors have a specific name, or present a certain best practice for appliances?
My assumption is that this might be a dedicated shunt for a higher current, but the lack of any symbols got me confused.
Update to provide more context
The device being examined is a socket extension that can measure the current going through the mains. Besides this resistor, the component I wasn't able to identify was this little guy: