Who applied for this cash card?

If you are referring to "Apple Cash" there is no application. You can turn it on or off as described in the following articles:

Set up Apple Cash - Apple Support

and

Close your Apple Cash account or turn it off on a device - Apple Support

Apple Cash isn’t an account you apply for like you may be thinking (not like the Apple Card or another credit card). It is the digital card that money sent from others will go to. Also would be where Daily Cash would go if you had the Apple Card credit card and earned from purchases.

Apple Cash - Apple