/// <remarks/>
 public void sendSignatureProofOfDeliveryFaxAsync(SignatureProofOfDeliveryFaxRequest SignatureProofOfDeliveryFaxRequest, object userState) {
     if ((this.sendSignatureProofOfDeliveryFaxOperationCompleted == null)) {
         this.sendSignatureProofOfDeliveryFaxOperationCompleted = new System.Threading.SendOrPostCallback(this.OnsendSignatureProofOfDeliveryFaxOperationCompleted);
     }
     this.InvokeAsync("sendSignatureProofOfDeliveryFax", new object[] {
                 SignatureProofOfDeliveryFaxRequest}, this.sendSignatureProofOfDeliveryFaxOperationCompleted, userState);
 }
 /// <remarks/>
 public void sendSignatureProofOfDeliveryFaxAsync(SignatureProofOfDeliveryFaxRequest SignatureProofOfDeliveryFaxRequest) {
     this.sendSignatureProofOfDeliveryFaxAsync(SignatureProofOfDeliveryFaxRequest, null);
 }