Once I have an Apostille, do I need anything else to show that the signature or seal on my public document is genuine?

No. An Apostille issued by the relevant Competent Authority is all that is required to establish that a signature or seal on a public document is genuine and to establish the capacity of the person or authority that signed or sealed the public document.

If the Convention applies, an Apostille is the only formality that is required to establish the origin of the public document – no additional requirement may be imposed to authenticate the origin of the public document.

You can verify your apostille legalization easily online!