Hi Hong Duong,
Are you wishing to relinquish your parenting rights as father of the child? If you are the children's father on their birth certificates you are deemed to be a person with parental responsibility and your consent will be required for various things such as obtaining passports, visas etc. If you want to give up this right and place the parenting responsibilities of your children solely in your wife's hands, you can "sign this over to her" by executing an agreement to that effect.
My recommendation would be to see a family lawyer to draft a comprehensive agreement for you so that you can be sure it covers everything that you want it to. That way you can be sure your wife will able to present it to prove she does not require your consent to authorities and you do not have to keep signing things or continually be involved in such matters.