Remove Cash On Delivery From Payment Options When Custom Field is Filled By Customer

[bselimb]

Hi,

Recently I got a new client who is using a custom html field attached to theme code like this;

 <div class="row" style="margin-top:-50px;">
      <div class="col-12">
        <div class="form-group tt-wrapper">
          <label for="requirement" class="tt-title-options">bla bla alter product based on bla bla requrements</label>
          <textarea placeholder="Please alter it to length 53" class="form-control col-12" id="requirement" name="properties[Requirement]"></textarea>
        </div>
      </div>
    </div>

What I need to do is I need to remove Cash On Delivery option when this custom field is filled. Now I have no idea how to do this, right now they are using Releasit COD app.

Thanks for your help. 

[PrintingStudio]

It's not available to mange in Settings > Payments?