Understanding that it is not always easy or uncomplicated, still from a reform point of view – this is the best thing you can do. At least, do your best to attempt to opt out of revising a child’s birth certificate (and you may get some serious push back from the powers that be).
Regarding the amending of birth certificates as part of adoption – many states have laws that say the birth certificate will be changed if requested by the adopter – California is one example. Of course, I would prefer that you don’t adopt a child at all. As an adoptive parent, you should not destroy another human beings legal kinship through you falsification of their birth certificate. In many states, it is a choice, not a mandate. If you are hell bent on adopting, despite the fact that guardianship is the more respectful way to provide care to another person’s child, the least you can do is specifically request the original birth certificate is not altered. Inform the judge that you will identify yourself and your authority over the child by showing a copy of your adoption decree and that the child will identify themselves with a copy of their unaltered birth certificate.
Please OPT OUT of birth certificate revision – if your state allows the option. If your state does not allow it – submit a request to the judge to opt out anyway, since you obviously have all the control as the adoptive parent anyway. Also OPT OUT of adoption and into guardianship. The only ethical choice is really guardianship. Adoption without birth certificate revision is just on way for you to cause less damage.
Here is one resource for you to check your state – LINK (click in title box at top) > State Codes Birth Certificate Revision.