checkbox not detect change from yes to no when check action ApprovalIn

Question

I work on asp.net MVC app . I face issue checkbox value not detected changing value from true to false or reverse .

meaning if I change checkbox Value from Yes to No OR No to Yes nothing detected according to speakstuff property model .

Exactly I need when checkbox check for yes then true and if check box for No will be false .

html script represent yes or No check box

<table style="border: 1px solid black;width:100%;margin-bottom:5px;">

            <tr>
                <td style="width: 50%; font-weight: bold; padding-top: 10px;">
                    @Html.Label("Did You Meet/Speak to Staff", htmlAttributes: new { @class = "control-label col-md-5" })
                    <div class="col-md-7">
                        <input type="checkbox" id="SpeakStuff" name="SpeakStuff" value="true" class="speak-stuff-checkbox" @(Model.SpeakStuff ? "checked" : "") />
                        Yes
                        &nbsp;&nbsp;
                        <input type="checkbox" id="SpeakStuff" name="SpeakStuff" value="false" class="speak-stuff-checkbox" @(!Model.SpeakStuff ? "checked" : "") />
                        No
                    </div>
                </td>
</table>

And below is jQuery to allow only selection with yes or no

<script>

    $(document).ready(function () {
        $('.speak-stuff-checkbox').on('change', function () {
            $('.speak-stuff-checkbox').not(this).prop('checked', false);
        });
});

I access value from form by java script

<script type="text/javascript">
        function submit() {
            var ResignationRequester = new Object();
            ResignationRequester.SpeakStuff = document.getElementById("SpeakStuff").value;
            
            

</script>

model that represent property SpeakStuff

 public class ResignationRequester
    {
        [Display(Name = "Employee No : ")]
        [Required]
        public int EmpID { get; set; }
        [Display(Name = "Request No")]
        public int RequestNo { get; set; }
        public bool SpeakStuff { get; set; }

    }

and When click approve button and check speakstuff property it still not changed

using (Html.BeginForm("ApprovalIndex", "Resignation", new { id = Model.RequestNo }, FormMethod.Post, htmlAttributes: new { @style = "display:inline;" }))
        {
            

            <a onclick="submit();" class="btn btn-primary" style="min-width: 100px;margin-top:5px;
            margin-left: 1300px;"><i class="glyphicon glyphicon-ok"></i> Approve </a>
            
        }

when debug model ResignationRequester speakstuff property it still true on all cases and if I change check box selection it still without change .

//post action method type
      
        public async Task<ActionResult> ApprovalIndex(ResignationRequester REQ)
        {
        }

So How to solve this issue ?