Honestly, without hearing the entire context, I have no idea. Farenheit 451 is a science-fiction story and so Ray Bradbury wrote in many technologies and practices that would have seemed futuristic back in the 1950s. One of these, possibly, is the idea that, instead of signing a physical piece of paper, a form could be signed and authorized over the telephone. This would have been a big deal back in 1953, although today it seems hopelessly archaic.
With this kind of science fiction, you often have to judge what the words might mean from how the author uses them. For example, it may seem odd to read an old science fiction story from the 1930s with the hero pointing a "ray gun" at some Martians. Nowadays we would more likely use "laser pistol", but of course the laser wasn't invented until the 1960s. Still you can easily guess from the hero's actions that a "ray gun" is some kind of weapon -- a gun that shoots some kind of rays instead of a physical projectile.