I do indeed! I’ve sent USD, GBP, and Euros from all over the world - Europe, North Africa, South America, and the US. (I was a “digital nomad” pre-pandemic.) They even give you a one-time-use token for cash payments so you can maintain the anonymity of your account number if the letter is intercepted.
Other than the letter I sent from Morocco, I never included a return address.
Other than the letter I sent from Morocco, I never included a return address.