If the server issues a cookie and the client does not carry the cookie when submitting the form, is the form submission valid?

If the server issues a cookie and the client does not carry the cookie when submitting the form, is the form submission valid?

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If the server issues a cookie and the client does not carry the cookie when submitting the form, is the form submission valid?

The form can definitely be submitted to the server, but after the server receives the submission request, it will depend on your logic to determine whether it is valid or invalid.
Generally, the server needs to verify whether the cookies are legal. If not, it will directly give an error message.