# Validating error when sign xml from zatca sdk

**URL:** <https://zatca1.discourse.group/t/validating-error-when-sign-xml-from-zatca-sdk/3124>\
**Category:** SDK, web-based validator and sandbox\
**Created:** [September 19, 2024, 6:08pm UTC](https://zatca1.discourse.group/t/validating-error-when-sign-xml-from-zatca-sdk/3124 "2024-09-19T18:08:02Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Post date:** [September 28, 2024, 5:21am UTC](https://zatca1.discourse.group/t/validating-error-when-sign-xml-from-zatca-sdk/3124/3 "2024-09-28T05:21:30Z")

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@themasdev ,

The solution for **schematrons** error is to make sure we copy the **ikvm folder** from the **Test folder** (not from the **dll folder** ) to where our application executable file directory is located.  
.

@Aturkistani  
There is no validation issue on Signed B2C Invoice signed using **X509Certificate from CCSID BinarySecurityToken**.

```auto
Processing Simplified Invoice...
Initialization Step (Simplified EInvoice) : True
Validate XSD : True
Validate EN Schematrons : True
Validate KSA Schematrons : True
Generate EInvoice Hash : True
Parse Certificate : True
Generate EInvoice QR : True
Validate QR Code : True
Validate EInvoice Signature : True
Validate EInvoice PIH : True
Overall Signed Invoice Validation : True!

Simplified Invoice processed successfully

```

I am still facing Validation issue for Signed B2C Invoice signed using **X509Certificate from PCSID BinarySecurityToken** (_[Error] CODE: signatureValue, MESSAGE: Wrong signature value._).

But this Signed B2C Invoice is approved by Reporting Server without any error or warning.

```auto
Initialization Step (Simplified EInvoice) : True
Validate XSD : True
Validate EN Schematrons : True
Validate KSA Schematrons : True
Generate EInvoice Hash : True
Parse Certificate : True
Generate EInvoice QR : True
Validate QR Code : True
Validate EInvoice Signature : False
[Error] CODE: signatureValue, MESSAGE: Wrong signature value.
Validate EInvoice PIH : True

Overall Signed Invoice Validation : False!

Reporting Simplified Invoice

{
  "requestType": "Reporting",
  "requestUrl": "https://gw-fatoora.zatca.gov.sa/e-invoicing/developer-portal/invoices/reporting/single",
  "statusCode": "200-OK",
  "reportingStatus": "REPORTED",
  "validationResults": {
    "status": "PASS",
    "infoMessages": [
      {
        "status": "PASS",
        "type": "INFO",
        "code": "XSD_ZATCA_VALID",
        "category": "XSD validation",
        "message": "Complied with UBL 2.1 standards in line with ZATCA specifications"
      }
    ],
    "warningMessages": [],
    "errorMessages": []
  }
}

```

This is my code to Sign Document and perform Validation Test

```auto
public static RequestResult GenerateSignedRequestApi(XmlDocument document, string csidBinaryToken, string privateKey, string pih)
{
    string x509CertificateContent = Encoding.UTF8.GetString(Convert.FromBase64String(csidBinaryToken));
    SignResult signedInvoiceResult = new EInvoiceSigner().SignDocument(document, x509CertificateContent, privateKey);

    // Validate Signed Invoice ***just test***
    EInvoiceValidator eInvoiceValidator = new();
    var validationResult = eInvoiceValidator.ValidateEInvoice(signedInvoiceResult.SignedEInvoice, x509CertificateContent, pih);
    if (validationResult != null) {
        foreach (var e in validationResult.ValidationSteps)
        {
            Console.WriteLine(e.ValidationStepName + " : " + e.IsValid);
            if (!e.IsValid)
            {
                foreach (var x in e.ErrorMessages)
                {
                    Console.WriteLine(x);
                }
            }
            else
            {
                foreach (var x in e.WarningMessages)
                {
                    Console.WriteLine(x);
                }
                //return new RequestGenerator().GenerateRequest(signedInvoiceResult.SignedEInvoice);
            }
               
        }
        Console.WriteLine($"Overall Signed Invoice Validation : {validationResult.IsValid}!");
    }

    return new RequestGenerator().GenerateRequest(signedInvoiceResult.SignedEInvoice);
}

```

Please advise, are there any steps I should take for this Signature Error problem on Validation. Thank you.

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