http://sparrowa7io5pz6ud3ehqzosvepbxbxt2zphmkjsylp2zgxooko23pqd.onion/docs/spending-privately.html
If you need to add the PayNym to your list of contacts, enter it in the Find Contact field and click Add Contact when it appears. To send to the PayNym, you will need to click the Link Contact button that appears after you have added the contact.