Accept me!

    Thanks for accepting.

    Form Code

    [acceptance acceptance-1] Accept me!
    [group group-1]
    Thanks for accepting.

    Conditional Fields

    show group if field operator value

    group-1 if acceptance-1 equals
    group-1 if acceptance-1 equals (regex) ^[a-zA-Z0-9._%-]+@[a-zA-Z0-9.-]+.[a-zA-Z]{2,4}$ 

    Notice: Do not use the acceptance field inside a conditional group, unless if you make it optional. If an acceptance field is not checked, CF7 disabled the submit button, even if the field is inside a hidden group.