The recent discussion about signing a form attendant or following the interview, as others have observed, is most likely about the Prohibitions form. It is of course important that the applicant only sign this form if there are no prohibitions and NONE of the situations in the form apply to the applicant. For those who truthfully addressed these situations in their application and for whom nothing relevant to those situations has changed, signing this form is no big deal, none at all.
But it is indeed hugely important that the applicant is truthfully affirming that none of those situations apply and that the applicant has NO prohibitions. Getting this wrong is perhaps one of the most serious mistakes an applicant can make.
The following observations, about the importance of KNOWING WHAT YOU ARE SIGNING, are NOT intended to cause alarm, and should not cause alarm.
Almost all qualified applicants understand how important it is to give accurate information in the application and how important their signature on the application (and other IRCC documents) is. The application itself, currently CIT 0002 (10-2017), requires essentially the same information as that required in the Prohibitions form which most (probably all) adult applicants are required to sign later in the process (either attendant the interview or the oath, or both). Assuming the applicant read and understood Item 16 in the application before signing and submitting the application, and nothing relevant to those questions has occurred since applying, no arrests for example, signing the Prohibitions form later in the process can be a perfunctory act without giving the precise content of the Prohibitions form much thought. Indeed, my understanding is that in interviews this form is typically presented or addressed by the interviewer concurrently asking, orally, if anything has changed or happened which might change how the applicant should respond to the Prohibitions questions.
That said, there may be a tendency to approach signing IRCC documents as casually as we approach signing other documents, in other contexts. That would be a mistake. A mistake without consequences for most applicants, applicants who have submitted almost entirely accurate information which has not changed during the time the application was in process. BUT a mistake which can have a HUGE and SERIOUSLY NEGATIVE impact if it results in signing a document that is not truthful (other than minor and non-material mistakes). This is especially true relative to the Prohibitions.
Observation/Caution: Reading and Understanding what you are signing for IRCC is Absolutely Important.
There are important differences between the IRCC documents citizenship applicants sign versus the multitude of documents we sign in the ordinary course of our daily activities and business affairs.
It is far, far more important to know what you are signing when signing IRCC documents for a citizenship application, than it is when signing the scores of other documents we sign in other contexts.
Re most documents we sign:
We sign stuff all the time without reading much if any of it. Much, usually most, often nearly all of it, is boilerplate. Essentially understood even if not read. These are documents in which our signature either effects agreement or acknowledges notice. These are contractual affirmations. At most they constitute a promise. At most they effect contractual or civil obligations (unless the documents are employed to commit fraud, such as signing a bank loan application based on fraudulent information). Even without reading more than a few words, if even that, we have a fair understanding of what it means to sign these documents, ranging from giving up contractual rights to agreeing to something like arbitration if there is a dispute, from acknowledging we have notice of certain policies or fee schedules to acknowledging this or that caveat or warning, from promising to pay this or promising to not do that, albeit a promise we can safely expect to only be enforced reasonably.
Lawyers will invariably advise us to read these documents before signing them, because our signature does indeed bind us, but almost as often as the rest of us those lawyers do not read them either, at least not anywhere near in their entirety.
That is, as a matter of near universal practice, we do not read many if not most documents we sign anywhere near in their entirety. If much at all.
Re IRCC documents citizenship applicants sign:
In contrast, in stark and important contrast, most of the IRCC documents a citizenship applicant signs constitute a verification of information under severe penalties, at the least comparable to penalties for perjury (yes, including
prison time), and at the least constituting the verification of information which, if not true, will FOREVER risk the validity of the grant of citizenship.
This is especially true of the Prohibitions form.
I do not have a copy of the currently used Prohibitions form which applicants are typically required to sign at the interview, and often again just before taking the Oath. I believe it is essentially the same as Item 16 in the current application form (CIT 0002 (10-2017).
Unlike a lot of information submitted in the application process, ranging from travel dates to work and address history, an inaccurate or untruthful response to the Prohibitions questions is:
(1) more likely material, a matter of significant importance, and correspondingly treated as such by the government, and
(2) more readily discovered and identified as NOT true (if and when it is indeed not true), and as such more easily proven to be not true (rather easy for the government to discover and prove an undisclosed arrest happened, since there is an official record of the arrest; similarly as to any criminal court action, such as imposition of probation), and THUS
(3) more likely to result in formal proceedings, such as allegation of misrepresentation if discovered prior to taking the oath, or revocation of citizenship if discovered after the oath has been taken
If a citizenship applicant, or a prospective citizenship applicant, is arrested for a relatively minor albeit potentially serious offence, there is NO CAUSE to panic. BUT it is imperative to handle the situation appropriately and responsibly. It is critical to understand it is NOT IRCC's responsibility to find out about it. Getting to and taking the oath does NOT mean it has worked out OK. In fact that could make matters much worse (note, for example, a misrepresentation discovered during the process, before the oath, results in a further FIVE year prohibition; if the misrepresentation is discovered after the oath, and citizenship is revoked, that results in a TEN YEAR prohibition . . . and make no mistake, a misrepresentation as to the Prohibitions is one of the more likely misrepresentations to be discovered AND prosecuted, including proceedings to revoke citizenship if discovered after the oath has been taken).
If arrested while the application is pending,
assume the applicant needs to inform IRCC about it UNLESS a competent lawyer diligently reviews the matter, determines it is not an indictable offence and otherwise does not invoke any prohibition. Since there are so many hybrid offences, which are indictable offences even if likely to be handled as a summary offence ("indictable" because they can be prosecuted by indictment), it is critical to get this right. Relatively minor bad acts can result in an arrest for an indictable offence, triggering a prohibition, and the failure to notify IRCC of this is a BAD MISTAKE, and it would be a really BAD MISTAKE to sign the Prohibitions form. Some applicants in such a scenario may be able to resolve the charges quickly, obtaining a discharge or having the matter resolved as a summary offence without any probation, which can avoid the prohibition; but this can be tricky and for most is something best handled by a competent criminal defense lawyer and reviewed, as to its impact on a citizenship applicant, by a competent immigration and citizenship lawyer. It is imperative to NOTIFY IRCC if the charge constitutes a prohibition, so the applicant needs to either notify IRCC of an arrest or charge, or the applicant needs to be near absolutely certain it has been resolved in such a way that there is NO prohibition. A mistake in this will be a BIG PROBLEM, either soon, or forever hanging over the person's citizenship (consider, for example, a romantic or business relationship going sour ten years later, the other person knows about the criminal charge while the citizenship application was pending, and vengefully gives a tip to the government . . . this is one of the few scenarios in which there is a real risk of proceedings to revoke citizenship, it being so easy to go back, find the records, and prove the case).