||Amazon Gift Cards||
Getting paid with Amazon Gift Cards is always safe and secure, but the problem is you would have to order things so it's not entirely the same thing as having cash.
You can have your customers send you Amazon Gift Cards straight to your email when the buy, by sending them:
They send the card to an email, which then you can redeem by logging into that email, and redeeming the gift card to your amazon balance.
A cool thing about this is, that you can have then send to a fake email, and forward the email to your real email and redeem it on a different account.
Doing this, there is no way they can find out who you really are, making Amazon Gift Cards the most secure form of payment to date.
I only do deals onsite through PM's/Contracts.
I do not use Discord, or Skype, or talk to members offsite whatsoever.