I see, so when did you do that if I may ask? Coz the local registrar is asking the document that is really coming from the Canadian embassy. Very complicated really
I was married in the Phils in April 2022 and was not asked for such a document. But, I understand that some local registrars do ask.
Many in the Phils do not understand that, unlike the Phils, Canada does not maintain a central registry of marriages. Hence, no Canadian government authority can issue a document saying that Canada has no record of any marriage for you, or certifying your capacity to marry (at least so far as Canada knows). They simply do not know.
In the Philippines, almost all marriages performed there, and quite a few from abroad, end up registered with the Philippines Statistics Authority. On request, the PSA will search their records and, if no marriage turns up, they will issue a "Cenomar" - Certificate of No Marriage. It is virtually a universal requirement to getting a marriage licence in the Phils that one produce a Cenomar. Me and my Filipino wife both had to produce Cenomars. I was not asked for a "Certificate of Legal Capacity to Contract Marriage" or any such document from Canada, likely because the local registrar knew that no one in Canada can certify that any Canadian is unmarried and free to marry. All one can do it to swear an affidavit saying they are not married. Kinda' useless, so not always requested. A few years ago, in a Phils town other than where I got married, I was asked about it by another Canadian who was getting married. In his case, the local registrar asked for an affidavit. I drafted one for him on my computer, printed it, and he swore it before a local notary. It did the job. As suggested by
@alljacks, there is no particular prescribed form or necessary magic words.
I am guessing you and your betrothed already have Cenomars, since almost guaranteed you will be asked for them. If you do not have them, most cities in the Phils have a PSA office. Walk in, fill in a form with your name and info and that of your parents (d.o.b., etc.) pay about P100 or so, take a seat and wait to be called. Some time later, you will be called to another counter and handed a document - a Cenomar. If not so lucky, then surprise! You'll be handed a document that looks about the same, but will show the details of a marriage the PSA has on your record.