cool one works well. suppose you have html codes like the following

<form> 

<input type="checkbox" name="mrcf-privacy" class="mrcf-input-boxes" id="mrcf-privacy" value="no"/>  Tick to confirm you have read and agree with the <a href="/" style="text-decoration:underline; color:navy;">Privacy notice</a><br/>        

<input type="submit" id="mrcf-submitted" name="mrcf-submitted" class="mrcf-input-boxes" value="Send"></form>

now the following jquery codes verifies if checkbox is checked. 

jQuery(function(){        

       if(jQuery('#mrcf-privacy').is(':checked')){  jQuery('#mrcf-submitted').submit();  }

}); 

Isn't that pretty simple? hope you liked it, don't forget to share and connect with me.