When using Person-to-Person payments, you will set up a security question and answer for your recipient to answer the first time you do a transaction together. The answer to the security question is space sensitive.
So if you write “NewYork” without spaces and the recipient writes “New York” with spaces, the security question would be invalid. There are a limited number of attempts a recipient can make to answer the security question correctly before the transaction is canceled automatically. So be sure to communicate directly with the person you send money.