diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Assertion.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Assertion.java
index 9bfab9a..3ba06f8 100644
--- a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Assertion.java
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Assertion.java
@@ -1,5 +1,6 @@
 package org.oneedtech.inspect.vc;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
@@ -64,9 +65,16 @@ public class Assertion extends Credential {
         }
     }
 
-    public enum Type {
-		Assertion,
-        Unknown;
+    public enum Type implements CredentialEnum {
+		Assertion(List.of("Assertion")),
+		BadgeClass(List.of("BadgeClass")),
+        Unknown(Collections.emptyList());
+
+        private final List<String> allowedTypeValues;
+
+        Type(List<String> typeValues) {
+            this.allowedTypeValues = typeValues;
+        }
 
 		public static Assertion.Type valueOf (JsonNode typeNode) {
 			if(typeNode != null) {
@@ -75,10 +83,23 @@ public class Assertion extends Credential {
                     if(value.equals("Assertion")) {
                         return Assertion;
                     }
+                    if(value.equals("BadgeClass")) {
+                        return BadgeClass;
+                    }
                 }
 			}
 			return Unknown;
         }
+
+        @Override
+        public List<String> getRequiredTypeValues() {
+            return Collections.emptyList();
+        }
+
+        @Override
+        public List<String> getAllowedTypeValues() {
+            return allowedTypeValues;
+        }
 	}
 
     public static final String ID = Assertion.class.getCanonicalName();
diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Credential.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Credential.java
index 3d74a87..e180ef5 100644
--- a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Credential.java
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Credential.java
@@ -74,6 +74,11 @@ public abstract class Credential extends GeneratedObject {
 	public static final List<ResourceType> RECOGNIZED_PAYLOAD_TYPES = List.of(SVG, PNG, JSON, JWT);
 	public static final String CREDENTIAL_KEY = "CREDENTIAL_KEY";
 
+    public interface CredentialEnum {
+        List<String> getRequiredTypeValues();
+        List<String> getAllowedTypeValues();
+    }
+
 	public abstract static class Builder<B extends Credential> {
         private Resource resource;
         private JsonNode jsonData;
diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/VerifiableCredential.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/VerifiableCredential.java
index b9443c6..c892844 100644
--- a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/VerifiableCredential.java
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/VerifiableCredential.java
@@ -5,6 +5,7 @@ import static org.oneedtech.inspect.vc.VerifiableCredential.Type.ClrCredential;
 import static org.oneedtech.inspect.vc.VerifiableCredential.Type.EndorsementCredential;
 import static org.oneedtech.inspect.vc.VerifiableCredential.Type.VerifiablePresentation;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -72,14 +73,20 @@ public class VerifiableCredential extends Credential  {
 
 			.build();
 
-	public enum Type {
-		AchievementCredential,
-		OpenBadgeCredential, 	//treated as an alias of AchievementCredential
-		ClrCredential,
-		EndorsementCredential,
-		VerifiablePresentation,
-		VerifiableCredential,  //this is an underspecifier in our context
-		Unknown;
+	public enum Type implements CredentialEnum {
+		AchievementCredential(Collections.emptyList()),
+		OpenBadgeCredential(List.of("OpenBadgeCredential", "AchievementCredential")), 	//treated as an alias of AchievementCredential
+		ClrCredential(List.of("ClrCredential")),
+		EndorsementCredential(List.of("EndorsementCredential")),
+		VerifiablePresentation(Collections.emptyList()),
+		VerifiableCredential(List.of("VerifiableCredential")),  //this is an underspecifier in our context
+		Unknown(Collections.emptyList());
+
+		private final List<String> allowedTypeValues;
+
+		Type(List<String> allowedTypeValues) {
+            this.allowedTypeValues = allowedTypeValues;
+        }
 
 		public static VerifiableCredential.Type valueOf (JsonNode typeNode) {
 			if(typeNode != null) {
@@ -98,6 +105,16 @@ public class VerifiableCredential extends Credential  {
 			}
 			return Unknown;
         }
+
+		@Override
+		public List<String> getRequiredTypeValues() {
+			return List.of("VerifiableCredential");
+		}
+
+		@Override
+        public List<String> getAllowedTypeValues() {
+            return allowedTypeValues;
+        }
 	}
 
 	public enum ProofType {
diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/TypePropertyProbe.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/TypePropertyProbe.java
index c8e03f0..2c25d7d 100644
--- a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/TypePropertyProbe.java
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/TypePropertyProbe.java
@@ -3,10 +3,11 @@ package org.oneedtech.inspect.vc.probe;
 import static org.oneedtech.inspect.util.code.Defensives.checkNotNull;
 
 import java.util.List;
+import java.util.stream.Collectors;
 
 import org.oneedtech.inspect.core.probe.RunContext;
 import org.oneedtech.inspect.core.report.ReportItems;
-import org.oneedtech.inspect.vc.VerifiableCredential;
+import org.oneedtech.inspect.vc.Credential.CredentialEnum;
 
 /**
  * A Probe that verifies a credential's type property.
@@ -14,38 +15,48 @@ import org.oneedtech.inspect.vc.VerifiableCredential;
  * @author mgylling
  */
 public class TypePropertyProbe extends PropertyProbe {
-	private final VerifiableCredential.Type expected;
+	private final CredentialEnum expected;
 
-	public TypePropertyProbe(VerifiableCredential.Type expected) {
+	public TypePropertyProbe(CredentialEnum expected) {
 		super(ID, "type");
 		this.expected = checkNotNull(expected);
 		this.setValidations(this::validate);
 	}
 
 	public ReportItems validate(List<String> values, RunContext ctx) {
-		if (!values.contains("VerifiableCredential")) {
-			return fatal("The type property does not contain the entry 'VerifiableCredential'", ctx);
+		List<String> requiredTypeValues = expected.getRequiredTypeValues();
+		if (!requiredTypeValues.isEmpty()) {
+			if (!requiredTypeValues.stream().allMatch(requiredValue -> values.contains(requiredValue))) {
+				return fatal(formatMessage(requiredTypeValues), ctx);
+			}
 		}
 
-		if (expected == VerifiableCredential.Type.OpenBadgeCredential) {
-			if (!values.contains("OpenBadgeCredential") && !values.contains("AchievementCredential")) {
-				return fatal("The type property does not contain one of 'OpenBadgeCredential' or 'AchievementCredential'", ctx);
-			}
-		} else if (expected == VerifiableCredential.Type.ClrCredential) {
-			if (!values.contains("ClrCredential")) {
-				return fatal("The type property does not contain the entry 'ClrCredential'", ctx);
-			}
-		} else if (expected == VerifiableCredential.Type.EndorsementCredential) {
-			if (!values.contains("EndorsementCredential")) {
-				return fatal("The type property does not contain the entry 'EndorsementCredential'", ctx);
-			}
-		} else {
+		List<String> allowedValues = expected.getAllowedTypeValues();
+		if (allowedValues.isEmpty()) {
 			// TODO implement
 			throw new IllegalStateException();
 		}
+		if (!values.stream().anyMatch(v -> allowedValues.contains(v))) {
+			return fatal(formatMessage(values), ctx);
+		}
 
 		return success(ctx);
 	}
 
+	private String formatMessage(List<String> values) {
+		StringBuffer buffer = new StringBuffer("The type property does not contain ");
+		if (values.size() > 1) {
+			buffer.append("one of");
+			buffer.append(values.stream()
+				.map(value -> "'" + value + "'")
+				.collect(Collectors.joining(" or "))
+			);
+
+		} else {
+			buffer.append("the entry '" + values.get(0) + "'");
+		}
+		return buffer.toString();
+	}
+
 	public static final String ID = TypePropertyProbe.class.getSimpleName();
 }