Here is their official statement regarding data security.
CentralDispatch understands the need to keep your data secure and private. Recently, we have received questions about whether or not we use dispatch sheet data to market CentralDispatch to your customers. We take your questions seriously and want you to know unequivocally that we have never used contact information on dispatch sheets to contact or market to anyone.
If you have any information to the contrary, please bring it to our attention and we will follow-up immediately. To date, we have not been able to independently verify a single instance of a customer being contacted by CentralDispatch or its agents using the dispatch sheet data.
We provide the online dispatch feature to simplify the dispatching process for you and create a standard communications format between our subscribers. Thousands of subscribers use it every day. We want you to know that you can use it freely without concern that we would ever use your dispatch data to contact your customers.