diff --git a/EnvelopeGenerator.Application/Common/Configurations/Pkcs11Options.cs b/EnvelopeGenerator.Application/Common/Configurations/Pkcs11Options.cs
index a6ad386f..5b89a9f4 100644
--- a/EnvelopeGenerator.Application/Common/Configurations/Pkcs11Options.cs
+++ b/EnvelopeGenerator.Application/Common/Configurations/Pkcs11Options.cs
@@ -81,9 +81,10 @@ public sealed class Pkcs11Options
     public string? DefaultReason { get; set; }
 
     /// <summary>
-    /// Optional global default application name used when request-level options do not specify a value.
+    /// Application name embedded into PDF signature metadata.
+    /// This value is controlled via app settings and is not client-overridable.
     /// </summary>
-    public string? DefaultApplicationName { get; set; }
+    public string? ApplicationName { get; set; }
 
     /// <summary>
     /// Controls how fallback signing time is created when request-level options do not specify a value.
diff --git a/EnvelopeGenerator.Infrastructure.Crypt/README.md b/EnvelopeGenerator.Infrastructure.Crypt/README.md
index 1c07d7f7..1cdbd06d 100644
--- a/EnvelopeGenerator.Infrastructure.Crypt/README.md
+++ b/EnvelopeGenerator.Infrastructure.Crypt/README.md
@@ -112,7 +112,7 @@ Configuration section: `Crypt:Pkcs11`
       "UserPin": "***",
       "PrivateKeyLabel": "sign-key",
       "CertificateLabel": "sign-cert",
-      "DefaultApplicationName": "signFLOW",
+      "ApplicationName": "signFLOW",
       "UseUtcSigningTime": true
     }
   }
diff --git a/EnvelopeGenerator.Infrastructure.Crypt/Services/PdfDigitalSignatureService.cs b/EnvelopeGenerator.Infrastructure.Crypt/Services/PdfDigitalSignatureService.cs
index 4592df7f..7e07a10a 100644
--- a/EnvelopeGenerator.Infrastructure.Crypt/Services/PdfDigitalSignatureService.cs
+++ b/EnvelopeGenerator.Infrastructure.Crypt/Services/PdfDigitalSignatureService.cs
@@ -44,7 +44,7 @@ public sealed class PdfDigitalSignatureService(IOptions<Pkcs11Options> options)
             Location = request.Location,
             ContactInfo = request.ContactInfo,
             SigningTime = request.SigningTime ?? (pkcs11Options.UseUtcSigningTime ? DateTimeOffset.UtcNow : DateTimeOffset.Now),
-            ApplicationName = request.ApplicationName ?? pkcs11Options.DefaultApplicationName,
+            ApplicationName = pkcs11Options.ApplicationName,
             CertificationLevel = ToDevExpressCertificationLevel(request.CertificationLevel)
                 ?? ToDevExpressCertificationLevel(pkcs11Options.DefaultCertificationLevel)
                 ?? PdfCertificationLevel.NoCertification
diff --git a/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Controllers/PdfSignatureController.cs b/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Controllers/PdfSignatureController.cs
index fa174215..4caf43d5 100644
--- a/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Controllers/PdfSignatureController.cs
+++ b/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Controllers/PdfSignatureController.cs
@@ -19,7 +19,6 @@ public class PdfSignatureController(IPdfDigitalSignatureService signatureService
         public string? Location { get; set; }
         public string? ContactInfo { get; set; }
         public DateTimeOffset? SigningTime { get; set; }
-        public string? ApplicationName { get; set; }
     }
 
     public sealed class CheckPdfSignatureForm
@@ -56,7 +55,6 @@ public class PdfSignatureController(IPdfDigitalSignatureService signatureService
             Location = request.Location,
             ContactInfo = request.ContactInfo,
             SigningTime = request.SigningTime,
-            ApplicationName = request.ApplicationName,
             CertificationLevel = PdfSignatureCertificationLevel.FormFillingAndAnnotations
         };
 
@@ -106,7 +104,6 @@ public class PdfSignatureController(IPdfDigitalSignatureService signatureService
             Reason = "reason",
             Location = "location",
             ContactInfo = "test@example.com",
-            ApplicationName = "signFLOW",
             CertificationLevel = PdfSignatureCertificationLevel.FormFillingAndAnnotations
         };
 
diff --git a/EnvelopeGenerator.Server/EnvelopeGenerator.Server/appsettings.json b/EnvelopeGenerator.Server/EnvelopeGenerator.Server/appsettings.json
index 2462a81f..ec34e679 100644
--- a/EnvelopeGenerator.Server/EnvelopeGenerator.Server/appsettings.json
+++ b/EnvelopeGenerator.Server/EnvelopeGenerator.Server/appsettings.json
@@ -65,7 +65,7 @@
       "PrivateKeyLabel": "company-sign-key-v1",
       "CertificateLabel": "company-sign-cert-v1",
       "DefaultReason": null,
-      "DefaultApplicationName": "signFLOW",
+      "ApplicationName": "signFLOW",
       "UseUtcSigningTime": true,
       "DefaultCertificationLevel": "NoCertification"
     }