diff --git a/acme4j-client/src/main/java/org/shredzone/acme4j/Account.java b/acme4j-client/src/main/java/org/shredzone/acme4j/Account.java
index 53ffe9a2..5df7326d 100644
--- a/acme4j-client/src/main/java/org/shredzone/acme4j/Account.java
+++ b/acme4j-client/src/main/java/org/shredzone/acme4j/Account.java
@@ -80,6 +80,9 @@ public class Account extends AcmeJsonResource {
 
     /**
      * Returns the current status of the account.
+     * <p>
+     * Possible values are: {@link Status#VALID}, {@link Status#DEACTIVATED},
+     * {@link Status#REVOKED}.
      */
     public Status getStatus() {
         return getJSON().get(KEY_STATUS).asStatusOrElse(Status.UNKNOWN);
diff --git a/acme4j-client/src/main/java/org/shredzone/acme4j/Authorization.java b/acme4j-client/src/main/java/org/shredzone/acme4j/Authorization.java
index 1a31b6d5..c19c2f47 100644
--- a/acme4j-client/src/main/java/org/shredzone/acme4j/Authorization.java
+++ b/acme4j-client/src/main/java/org/shredzone/acme4j/Authorization.java
@@ -60,9 +60,12 @@ public class Authorization extends AcmeJsonResource {
 
     /**
      * Gets the authorization status.
+     * <p>
+     * Possible values are: {@link Status#PENDING}, {@link Status#VALID},
+     * {@link Status#INVALID}, {@link Status#DEACTIVATED}, {@link Status#REVOKED}.
      */
     public Status getStatus() {
-        return getJSON().get("status").asStatusOrElse(Status.PENDING);
+        return getJSON().get("status").asStatusOrElse(Status.UNKNOWN);
     }
 
     /**
diff --git a/acme4j-client/src/main/java/org/shredzone/acme4j/Order.java b/acme4j-client/src/main/java/org/shredzone/acme4j/Order.java
index fb648ed8..9583ae8e 100644
--- a/acme4j-client/src/main/java/org/shredzone/acme4j/Order.java
+++ b/acme4j-client/src/main/java/org/shredzone/acme4j/Order.java
@@ -40,6 +40,9 @@ public class Order extends AcmeJsonResource {
 
     /**
      * Returns the current status of the order.
+     * <p>
+     * Possible values are: {@link Status#PENDING}, {@link Status#READY},
+     * {@link Status#PROCESSING}, {@link Status#VALID}, {@link Status#INVALID}.
      */
     public Status getStatus() {
         return getJSON().get("status").asStatusOrElse(Status.UNKNOWN);
diff --git a/acme4j-client/src/main/java/org/shredzone/acme4j/Status.java b/acme4j-client/src/main/java/org/shredzone/acme4j/Status.java
index a87ff9f0..d6bee2ae 100644
--- a/acme4j-client/src/main/java/org/shredzone/acme4j/Status.java
+++ b/acme4j-client/src/main/java/org/shredzone/acme4j/Status.java
@@ -20,7 +20,53 @@ import java.util.Arrays;
  */
 public enum Status {
 
-    PENDING, PROCESSING, VALID, INVALID, REVOKED, DEACTIVATED, UNKNOWN;
+    /**
+     * The server has created the resource, and is waiting for the client to process it.
+     */
+    PENDING,
+
+    /**
+     * The {@link Order} is ready to be finalized. Invoke {@link Order#execute(byte[])}.
+     */
+    READY,
+
+    /**
+     * The server is processing the resource. The client should invoke
+     * {@link AcmeJsonResource#update()} and re-check the status.
+     */
+    PROCESSING,
+
+    /**
+     * The resource is valid and can be used as intended.
+     */
+    VALID,
+
+    /**
+     * An error or authorization/validation failure has occured. The client should check
+     * for error messages.
+     */
+    INVALID,
+
+    /**
+     * The {@link Authorization} has been revoked by the server.
+     */
+    REVOKED,
+
+    /**
+     * The {@link Account} or {@link Authorization} has been deactivated by the client.
+     */
+    DEACTIVATED,
+
+    /**
+     * The {@link Authorization} is expired.
+     */
+    EXPIRED,
+
+    /**
+     * The server did not provide a status, or the provided status is not a specified ACME
+     * status.
+     */
+    UNKNOWN;
 
     /**
      * Parses the string and returns a corresponding Status object.
diff --git a/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/Challenge.java b/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/Challenge.java
index 31c63f91..b59ddc36 100644
--- a/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/Challenge.java
+++ b/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/Challenge.java
@@ -68,6 +68,9 @@ public class Challenge extends AcmeJsonResource {
 
     /**
      * Returns the current status of the challenge.
+     * <p>
+     * Possible values are: {@link Status#PENDING}, {@link Status#PROCESSING},
+     * {@link Status#VALID}, {@link Status#INVALID}.
      */
     public Status getStatus() {
         return getJSON().get(KEY_STATUS).asStatusOrElse(Status.UNKNOWN);