You can create your own DataSubmissionService then override the method GetSubmissionData where you can call the base then remove the contact number field before return submission data (and also save number to your table). Is that solving your problem?

Hi Dac Thach Nguyen,thanks for your reply.can you explain abit about it or provide some referance code 

Thanks,

Ramkee.G

<p>Create your service</p> <pre class="brush:csharp;auto-links:false;toolbar:false" contenteditable="false">[ServiceConfiguration(typeof(DataSubmissionService), Lifecycle = ServiceInstanceScope.Singleton)] public class CustomDataSubmissionService : DataSubmissionService { protected override Submission GetSubmissionData(NameValueCollection rawSubmittedData, FormContainerBlock formContainer, HttpContextBase httpContext, bool isFinalized) { var data = base.GetSubmissionData(rawSubmittedData, formContainer, httpContext, isFinalized); // Save your phone number from posted data var phone = data.Data["_field_123"]; // remove your phone number field data.Data.Remove("_field_123"); return data; } }</pre> <p>Register your service in initialize module to make form use your service instead of default one:</p> <pre class="brush:csharp;auto-links:false;toolbar:false" contenteditable="false">public void ConfigureContainer(ServiceConfigurationContext serviceConfigurationContext) { serviceConfigurationContext.Services.AddSingleton&lt;DataSubmissionService, CustomDataSubmissionService&gt;(); }</pre> <p></p>