You know, I've had times where I didn't have a pad or pen handy these days. I may have left them in the truck for any number of reasons related to the environments I work in these days. In cases where I am talking business, I let the other person know that I don't have that available and why, then I ask them to send me an e-mail or leave a text. It's generally not a problem, most of my clients are delighted to have a contractor show up that isn't either high or drunk.