yes
You can't change your age on your BIRTH certificate unless you can actually prove that the date on the BIRTH certificate is wrong.
I think you can ask for a copy of your birth certificate at any age.
You must have been born already. Other than that, there is no minimum age at which you can apply for a birth certificate. There is no minimum age at which your birth can be registered either.
Look at birth certificate
The only way to tell a person's age is to ask them. You can get a rough estimate by looking at them.
=Age changes because the day of your birth comes every year not everyday so the age of a kid or an adult will change constantly every year on the day you were born.=
You ask for his I.D. card or birth certificate.
There are no known laws that state a parent has to give their children their birth certificate at a certain age, so they do not have a legal obligation to do so.
There is really no way, unless you want to change your birth year, which I don't suggest doing.
You do not change ANYTHING in your passport. Your age is shown by your date of birth in the passport. If you attempt changing anything you will be breaking the law and render the passport invalid.
Birth Certificate
If you had sex with her when she was under the age of consent it was statutory rape. So it all depends what that age is where you live.