diff --git a/src/ClientManager.Infrastructure/Services/ResendEmailService.cs b/src/ClientManager.Infrastructure/Services/ResendEmailService.cs
index 6e66ef4..1130cfe 100644
--- a/src/ClientManager.Infrastructure/Services/ResendEmailService.cs
+++ b/src/ClientManager.Infrastructure/Services/ResendEmailService.cs
@@ -71,4 +71,68 @@ public async Task SendWelcomeEmailAsync(string email, string name, byte[]? attac
             logger.LogError(ex, "Exception while sending email to {Email} via Resend", email);
         }
     }
+
+    public async Task SendWelcomeEmailToUserAsync(string email, string username)
+    {
+        var apiKey = configuration["Resend:ApiKey"];
+        var fromEmail = configuration["Resend:FromEmail"] ?? "onboarding@resend.dev";
+        var fromName = configuration["Resend:FromName"] ?? "ClientManager";
+
+        if (string.IsNullOrEmpty(apiKey))
+        {
+            logger.LogWarning("Resend API key not configured. Skipping welcome email to {Email}", email);
+            return;
+        }
+
+        try
+        {
+            using var client = new SmtpClient("smtp.resend.com", 465)
+            {
+                Credentials = new NetworkCredential("resend", apiKey),
+                EnableSsl = true
+            };
+
+            var htmlContent = $@"
+                <div style='font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto; background-color: #ffffff;'>
+                    <div style='background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); padding: 30px; text-align: center; border-radius: 10px 10px 0 0;'>
+                        <h1 style='color: #ffffff; margin: 0; font-size: 28px;'>Welcome to ClientManager!</h1>
+                    </div>
+                    <div style='padding: 30px; border: 1px solid #e0e0e0; border-top: none; border-radius: 0 0 10px 10px;'>
+                        <p style='color: #333333; font-size: 16px; line-height: 1.6;'>Hello <strong>{username}</strong>,</p>
+                        <p style='color: #333333; font-size: 16px; line-height: 1.6;'>Congratulations! Your registration at <strong>ClientManager</strong> has been completed successfully.</p>
+                        <p style='color: #333333; font-size: 16px; line-height: 1.6;'>You now have full access to our client and document management platform.</p>
+                        <div style='background-color: #f8f9fa; padding: 20px; border-radius: 8px; margin: 25px 0; border-left: 4px solid #667eea;'>
+                            <p style='margin: 0 0 10px 0; color: #333333; font-weight: bold; font-size: 16px;'>Next steps:</p>
+                            <ul style='color: #555555; font-size: 14px; line-height: 1.8; padding-left: 20px; margin: 0;'>
+                                <li>Access your account and complete your profile</li>
+                                <li>Start registering your clients</li>
+                                <li>Upload and organize your documents</li>
+                                <li>Explore all available features</li>
+                            </ul>
+                        </div>
+                        <p style='color: #333333; font-size: 16px; line-height: 1.6;'>If you have any questions, our team is ready to help.</p>
+                        <p style='color: #333333; font-size: 16px; line-height: 1.6;'>Best regards,<br><strong>ClientManager Team</strong></p>
+                    </div>
+                    <div style='text-align: center; padding: 20px; background-color: #f8f9fa; border-radius: 0 0 10px 10px;'>
+                        <p style='color: #999999; font-size: 12px; margin: 0;'>&copy; {DateTime.UtcNow.Year} ClientManager. All rights reserved.</p>
+                    </div>
+                </div>";
+
+            var mailMessage = new MailMessage
+            {
+                From = new MailAddress(fromEmail, fromName),
+                Subject = "Welcome to ClientManager!",
+                Body = htmlContent,
+                IsBodyHtml = true
+            };
+            mailMessage.To.Add(new MailAddress(email, username));
+
+            await client.SendMailAsync(mailMessage);
+            logger.LogInformation("Welcome email sent successfully to {Email} via Resend", email);
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Exception while sending welcome email to {Email} via Resend", email);
+        }
+    }
 }