I've been playing around on seeking arrangements for a while, finding occasional femdom arrangements that way. Overall, in the sugaring community, if you MUST do an electronic payment, Cashapp is king as far as safety and anonymity -- it's the app that's most difficult to reverse transactions on (safer for the woman being paid) and the one with the most anonymity (safer for all concerned). I haven't used it myself, but this might be an area the femdom community can learn from the sugaring community. I googled it quickly and it looks like each party can claim a $cashtag that is an anonymous handle, by which money can be exchanged.

In the sugaring community, the reputation as far as safety and anonymity of payment apps, in order, is:

1. CashApp (best)
2. Venmo
3. Paypal (worst)