Yes. Immediately after the marriage is solemnised, you, your celebrant and your two witnesses sign the required marriage certificates. In a usual celebrant-led wedding there are three: the presentation certificate you keep and two official copies for the celebrant and registry.

Your celebrant will show you where to sign and guide the order. Read your names and details carefully beforehand and tell them about any error before signing.

You also complete a declaration before the marriage that there is no legal impediment to it. Ask your celebrant which name and signature to use on each document; do not assume you should begin signing with a new married surname during the ceremony.