Thats what I was going to say. On a similar topic. One of the best feelings you can have is when reciting a reference number or visa details over the phone, either to or from and the other person understands not to wait for confirmation that the numbers are passed on. Its a beautiful thing. If you read a card number out four digits at a time pause for half a second and just carry on. It is highly likely that the person recieving the numbers gets it. Don't be afraid to try. You certainly dont say 2 numbers and wait for reply. I've had someone wait for me to say "yeah" after EVERY digit. That took about 3 minutes to confirm I had the right number because she also wanted to repeat it to check I had it right, which meant I started writing numbers down in the wrong place. One... Yeah One. Yeah Two. Yeah Eight Yeah So one Yeah One Yeah Two Yeah Eight, Yeah, notice its the same. Have you just given me 8 numbers? No four.