diff --git a/Models/AcmeChallenge.cs b/Models/AcmeChallenge.cs
index 79c8dca..7e8f139 100644
--- a/Models/AcmeChallenge.cs
+++ b/Models/AcmeChallenge.cs
@@ -1,10 +1,14 @@
-namespace KCert.Models;
+using System.Text.Json.Nodes;
+
+namespace KCert.Models;
 
 public class AcmeChallenge
 {
-    public string Url { get; set; } = default!;
-    public string Type { get; set; } = default!;
-    public string Status { get; set; } = default!;
-    public string Token { get; set; } = default!;
-    public string Validated { get; set; } = default!;
+    public required string Url { get; init; }
+    public required string Type { get; init; }
+    public required string Status { get; init; }
+    public required string Token { get; init; }
+    public required string Validated { get; init; } 
+    
+    public JsonObject? Error { get; init; }
 }
diff --git a/Models/AcmeOrderResponse.cs b/Models/AcmeOrderResponse.cs
index f15abb7..c4db004 100644
--- a/Models/AcmeOrderResponse.cs
+++ b/Models/AcmeOrderResponse.cs
@@ -1,11 +1,15 @@
-namespace KCert.Models;
+using System.Text.Json.Nodes;
+
+namespace KCert.Models;
 
 public class AcmeOrderResponse : AcmeResponse
 {
-    public string Status { get; set; } = default!;
-    public string Expires { get; set; } = default!;
-    public AcmeIdentifier[] Identifiers { get; set; } = default!;
-    public string[] Authorizations { get; set; } = default!;
-    public string Finalize { get; set; } = default!;
-    public string Certificate { get; set; } = default!;
+    public required string Status { get; init; }
+    public required string Expires { get; init; }
+    public AcmeIdentifier[] Identifiers { get; init; }
+    public required string[] Authorizations { get; init; }
+    public required string Finalize { get; init; }
+    public required string Certificate { get; init; }
+    
+    public JsonObject? Error { get; init; }
 }
diff --git a/Services/RenewalHandler.cs b/Services/RenewalHandler.cs
index 1c60513..f80237b 100644
--- a/Services/RenewalHandler.cs
+++ b/Services/RenewalHandler.cs
@@ -101,7 +101,15 @@ private async Task<string> ValidateAuthorizationAsync(string key, string kid, st
         {
             await Task.Delay(waitTime);
             finalize = await acme.GetOrderAsync(key, orderUri, kid, finalize.Nonce);
-            logbuf.LogInformation("Check Order {orderUri}: {finalize.Status}", orderUri, finalize.Status);
+            
+            if (finalize.Error is { } error)
+            {
+                logbuf.LogWarning("Check Order {orderUri}: {finalize.Status}\nError: {error}", orderUri, finalize.Status, error);
+            }
+            else
+            {
+                logbuf.LogInformation("Check Order {orderUri}: {finalize.Status}", orderUri, finalize.Status);
+            }
         }
 
         if (finalize.Status != "valid")