Jurat definition, Law. a certificate on an affidavit, by the officer, showing by whom, when, and before whom it was sworn to. See more.
Source: Jurat | Define Jurat at Dictionary.com
If one is to be picky about these things, this is the place where the solicitor/administrator of oaths is *supposed* to put their details, not where they indicate that the deponent is supposed to put their signature.
Wills and the rest 