What your therapist is asking is pretty standard for out-of-network payment. I did this with my previous therapist. And like someone else mentioned, I'd save up a number of session payments and submit them on an insurance form. After doing payment this way I learned to really appreciate what doctors and therapists have to go through to get their money. Sometimes the payments would come through in 6 to 8 weeks, but I've had some that took THREE MONTHS. And worse of all, I'd have none show up for months and months and when I'd check they'd have some excuse or glitch. I always got my money because I'm pretty persistent, but after it happened about five times over the years, I began to wonder if the insurance company with actually sitting on the payments to see if I'd actually follow up.