I have become very anal about taking hardcopies of EVERYTHING! When I book an excursion I copy the description over to a Word doc so I can easily print it, along with the cost information. Print. Then, when I get the payment confirmation email (I only do one excursion at a time) I print that out as well and staple both pages together & throw it into a folder that I take with me on the cruise. I've only needed this type of info a couple of times...but just having it available *once* and being able to easily resolve an issue with someone saying "You have not purchased this" is absolutely worth the time in setting it all up. Some people are *much* more trusting in "the system"...I *used* to be!