Page "mystery" Paragraph 93

He had written out the license number of his car but had transposed the last two figures, an old dodge which is still good.

Ninety-nine times out of a hundred the motel manager doesn't check the license number on the plates against the license number the tenant writes out.

If he does, it's still better than an even chance he won't notice the transposition of the numbers, and if he should notice it, the thing can be passed off as an honest mistake.