>I have had to send cash to my sister a handful of times recently. Because her bank (Bank of America) stopped allowing cash deposits to any account other than your own, the most convenient and inexpensive way to do this was through Walmart, which has its own money transfer service. You can arrange the transfer through an app, then you go to an express line at a Walmart store and complete the whole transaction in under a minute.
The fact that you can't just send money from your online banking to another person absolutely baffles me.