It is used on a small board RFID antenna circuit based on the TMS3705:
At the first check it seems to be a 0 ohm resistor, but the dimension 4x4mm its strange.
It is a "zero ohm link".
You can find them listed in the resistors section of a vendor's parts catalog.
It is typically used to turn on or off configuration options on the circuit board. The "0" marking is intended to make this stand out among a group of actual resistors.
They come in many sizes and even through hole versions. It is possible that this one is large in order to make hand-soldering easier.
It is a 0 ohm resistor. They probably planned to have an inductor there, but replaced it with the 0 ohm resistor during testing/production preparation. It might be replaced to reduce cost. Or they might have it as a way of correcting the impedance of the antenna if needed. You can of course measure it using a multi meter.
As others have said, it's a 0\$\Omega\$ resistor.
The reason why the unusual package is used is because they wish to minimize the inductance since it's in an RF circuit.
Here is a datasheet for resistors (including 0\$\Omega\$) in wide (side terminated) packages.