Hi Yves
Without the certificate, you can't get the CFO stamp after you get the visa and so you can't travel on a Fiancé or Spouse visa (usually you're blocked at immigration, even if some escape and were able to travel anyway). But they may be blocked on the next travel...
By the way, I may be wrong but I wouldn't expect they e-mail you back... Better let the Fiancé/Spouse to call them from the Philippines as the "foreigner" is not at all involved in the process. I was even not allowed to enter the CFO when we came back there together.
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I have lived in Spain for 20 years so I am accustomed to accepting that what countries do varies, but I must say I am a little ruffled when a democratic country can prevent its citizens, who have committed no crime, from leaving. In this case I do not see any tremendous difference between a person going for say a 3/6 month holiday, visiting a friend in another country, no seminar or stamp needed, with a person who is going to visit a fiancée with a view to getting married.
I did experience being totally excluded both at the seminar and then when we went to CFO to get the stamp, however, on that occasion I was allowed by a guard to sit at the back providing I did not say anything.
I have on a previous occasion had a reply to an email from CFO, but as you say, I don’t necessarily expect one this time, but it would be civilised.