The general term restitution describes the act of restoration. The term is used in different areas of the law but carries the same meaning throughout. The basic purpose of restitution is to achieve fairness and prevent the Unjust Enrichment of a party.
Phone number for Square is 877-417-4551. Although, it seems to be a recorded message. I found a great alternative to Square that offers live 24/7 customer support with real human beings to speak with! Go to http://www.mobilecardreader.biz/.
Square Cash users do have the ability to flip a switch in their settings that turns on an authentication process. Once you do that, you have to type in the three-digit number on the back of your debit card each time you send money.