I was not happy with this product. Previously "Pay to the Order of" did NOT show in the address portion of the envelope. Anyone can see there is obviously a check enclosed.
Envelopes do their job Print your invoices fold them and they are ready to go. I like that they have a security lining for client's privacy. It might take a couple of practice folds to get the folds right because it does not fold into thirds but otherwise the process it straightforward. Only thing I wish: that is were self-adhesive.