Hi tahtouh,
I think you are asking about the fiduciary marks...you need not have a hole....
Just have it as an SMD pad and solder mask must be opened...No need paste or silk....
There are two types of fiducials Global and Local....You probably need to add Three global fiducials, one at each corner of your PCB.
For Fine pitch components you need to add two fiducials diagnal(optional) to each other....
For more information try googling for fiduciary marks and at SMEMA...
Shabu.