Easy card / Easily take out the card

I find it troublesome whenever i try to get my credit card out of my wallet because it is already
so packed. what makes it worse, ironically, is the simplicity of each and every card. there is no place on the card where you can apply
force to pick it out.
therefore, i came out with an idea to create a slight groove in a credit card. A flourescent indicator can also be placed
by the groov, making it easier to find. this groove will not interrupt in the process of payment.