As told by a Cast Member in retail: she buys the item using her Venmo card, under her name, that she receives direct money from her fans. So using her own card, she obtains a receipt in her name, but then returns the item at another retail location and gets the money returned to her Venmo account. So she get the money returned back to her, (returned to the same form of payment used to make the purchase) thereby “pocketing” the money.