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Affidavit to use the surname of the father (AUSF) - VFS Global 2026

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The document is an Affidavit to Use the Surname of the Father, intended for individuals seeking to use their father's surname on their or their child's Certificate of Live Birth. It outlines the necessary declarations and information required under R.A. No. 9255 and its Revised Implementing Rules and Regulations, including personal details of the affiant, the child, and relevant registration information.

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Click ‘Get Form’ to open it in the editor.
Begin by filling in your name, citizenship, civil status, age, and complete address in the designated fields.
In section 1, specify the surname you wish to use and indicate whether it is for your own Certificate of Live Birth or that of your child. Provide the child's full name and your relationship to them.
Complete section 2 by entering your date of birth and place of birth accurately.
In section 3, input the registry number and date of registration for your birth record.
Fill out section 4 with details regarding the Affidavit of Admission of Paternity or Private Handwritten Instrument as required.
Review all information for accuracy before signing in section 7. Ensure you date the document appropriately.

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Versions	Form popularity	Fillable & printable
2022	4.6 Satisfied (38 Votes)
2017	4 Satisfied (31 Votes)

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Where to get Affidavit to use the surname of the father in the Philippines?

You can use the surname of the father by applying the provisions of R.A. 9255. The affidavit of acknowledgment executed by the father should be registered with the civil registry office where the birth of the child was registered.

Can you give a baby the fathers last name without his consent?

You cannot be forced to give the baby the last name of the father. However, the father can petition the court to change the name of the child. Then a court can make a decision on this issue. Having a case in Family Court costs money for both of you.

What is authorization to use the surname of father?

2.3 Affidavit to Use the Surname of the Father (AUSF) is an instrument executed in order to use the surname of the father . The AUSF is a registrable document. 2.4 Local Civil Registry Office (LCRO) is a department in the city or municipal government mandated to perform civil registration functions .

Do I have to give my son his fathers last name?

Although the last name of the baby doesnt have a legal bearing on paternity or parentage, when parents are unmarried or have different last names, questions can arise about which last name the baby should have. In most states, you may give your child any first, middle, and last name you like.

How to correct fathers name in birth certificate Philippines?

The petition must be filed with the Regional Trial Court (RTC) of the locality where the civil registry is located. The person filing the petition may be the child, the parents, or any interested party. If the child is a minor, the legal guardian or the mother may file the petition on their behalf.

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Can an illegitimate child use the middle name of the mother?

Middle Name: In Philippine naming conventions, the middle name typically reflects the mothers maiden surname. For illegitimate children, the use of a middle name is not mandated by law. Generally, the middle name of an illegitimate child is either omitted or reflects the mothers surname before marriage.