After your annulment has been granted by the court, you need to file the court decree at the Civil Registrar’s office. You need to do this in order for your marriage certificate (from your previous marriage) to be annotated with the details of the approved annulment. This will serve as proof that you are now free to marry again.
Most of the time, filing the court decree at the City Hall is included in the petitioner’s lawyer’s services; however, in cases when the petitioner is left to process the documents on his own, he or she may find the following information useful.
Read on.
Step 1:
Register the Court Decree of Annulment at the City or Municipal Civil Registrar’s (C/MCR) Office where the court is functioning. Secure a Certified True Copy of the Court Decree from the same office.
Step 2:
Secure a copy of the Certification of Registration of the court decree from the C/MCR Office.
Step 3:
Secure Certification of Finality from the court which rendered the decree.
Step 4:
Petitioners are usually advised to allow 60 days before requesting for a copy of the annotated Marriage Certificate. After 60 days, they may secure a Certified True Copy of the Marriage Certificate from the C/MCR Office where the marriage is registered with remarks/annotations based on the Court Decree of Annulment.
Step 5:
If the PSA does not have it on file yet, the Marriage Certificate has to be endorsed (officially transmitted) to PSA by the C/MCR Office where the marriage was registered. The petitioner may simply visit the C/MCR and advise that his marriage certificate has to be endorsed to the PSA.
Source: www.psa.gov.ph
MasterCitizen's Blog 
Hi!
My annulment has been granted three or four years ago. But because I live far from where I got married and the court where it was granted, I never got to register the Court Decree of Annulment. I heard that my ex-husband recently remarried. Does that mean my annulment has been registered with NSO? And if so, do I still have to register it from my end?
Hi Erika,
You can check by requesting for a copy of your previous marriage. If the marriage certificate already has annotations of the court decree of your annulment, then that means your annulment has been filed and acknowledged by the LCR and by PSA.
MC
is there a penalty fee for late registration of annulment.if there is? hm?4 years late filling
What do you mean of late registration of annulment?