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 74125f3..1febb31 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
@@ -9,6 +9,7 @@ import java.util.function.Function;
 import org.oneedtech.inspect.schema.Catalog;
 import org.oneedtech.inspect.schema.SchemaKey;
 import org.oneedtech.inspect.util.resource.Resource;
+import org.oneedtech.inspect.vc.Validation.MessageLevel;
 import org.oneedtech.inspect.vc.util.JsonNodeUtil;
 import org.oneedtech.inspect.vc.util.PrimitiveValueValidator;
 
@@ -148,7 +149,8 @@ public class Assertion extends Credential {
         URL(PrimitiveValueValidator::validateUrl),
         URL_AUTHORITY(PrimitiveValueValidator::validateUrlAuthority),
 
-        IMAGE(null);
+        IMAGE(null),
+        ISSUER(null);
 
         private final Function<JsonNode, Boolean> validationFunction;
 
@@ -264,7 +266,8 @@ public class Assertion extends Credential {
         new Validation.Builder().name("email").type(ValueType.EMAIL).required(true).build(),
         new Validation.Builder().name("telephone").type(ValueType.TELEPHONE).required(false).build(),
         new Validation.Builder().name("publicKey").type(ValueType.ID).expectedType(Type.CryptographicKey).fetch(true).required(false).build(),
-        new Validation.Builder().name("verification").type(ValueType.ID).expectedType(Type.VerificationObjectIssuer).fetch(false).required(false).build()
+        new Validation.Builder().name("verification").type(ValueType.ID).expectedType(Type.VerificationObjectIssuer).fetch(false).required(false).build(),
+        new Validation.Builder().name("id").type(ValueType.ISSUER).required(false).messageLevel(MessageLevel.Warning).build()
     ))
     .put(Type.Profile, List.of(
         new Validation.Builder().name("id").type(ValueType.IRI).required(true).build(),
@@ -276,7 +279,8 @@ public class Assertion extends Credential {
         new Validation.Builder().name("email").type(ValueType.EMAIL).required(true).build(),
         new Validation.Builder().name("telephone").type(ValueType.TELEPHONE).required(false).build(),
         new Validation.Builder().name("publicKey").type(ValueType.ID).expectedType(Type.CryptographicKey).fetch(true).required(false).build(),
-        new Validation.Builder().name("verification").type(ValueType.ID).expectedType(Type.VerificationObjectIssuer).fetch(false).required(false).build()
+        new Validation.Builder().name("verification").type(ValueType.ID).expectedType(Type.VerificationObjectIssuer).fetch(false).required(false).build(),
+        new Validation.Builder().name("id").type(ValueType.ISSUER).required(false).messageLevel(MessageLevel.Warning).build()
     ))
     .put(Type.RevocationList, List.of(
         new Validation.Builder().name("type").type(ValueType.RDF_TYPE).required(true).many(true).mustContainOneType(List.of(Type.RevocationList)).build(),
diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Validation.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Validation.java
index 8ecd22c..42a0b6f 100644
--- a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Validation.java
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/Validation.java
@@ -20,6 +20,7 @@ public class Validation {
     private final boolean fetch;
     private final String defaultType;
     private final boolean fullValidate;
+    private MessageLevel messageLevel;
 
     public Validation(Builder builder) {
         this.name = builder.name;
@@ -34,9 +35,9 @@ public class Validation {
         this.fetch = builder.fetch;
         this.defaultType = builder.defaultType;
         this.fullValidate = builder.fullValidate;
+        this.messageLevel = builder.messageLevel;
     }
 
-
     public String getName() {
         return name;
     }
@@ -85,6 +86,15 @@ public class Validation {
         return fullValidate;
     }
 
+    public MessageLevel getMessageLevel() {
+        return messageLevel;
+    }
+
+    public enum MessageLevel {
+        Warning,
+        Error
+    }
+
     public static class Builder {
         private String name;
         private Assertion.ValueType type;
@@ -98,11 +108,13 @@ public class Validation {
         private boolean fetch;
         private String defaultType;
         private boolean fullValidate;
+        private MessageLevel messageLevel;
 
         public Builder() {
             this.mustContainOne = new ArrayList<>();
             this.prerequisites = new ArrayList<>();
             this.expectedTypes = new ArrayList<>();
+            this.messageLevel = MessageLevel.Error;
         }
 
         public Builder name(String name) {
@@ -184,6 +196,11 @@ public class Validation {
             return this;
         }
 
+        public Builder messageLevel(MessageLevel messageLevel) {
+            this.messageLevel = messageLevel;
+            return this;
+        }
+
         public Validation build() {
             return new Validation(this);
         }
diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/validation/ValidationIssuerPropertyProbe.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/validation/ValidationIssuerPropertyProbe.java
new file mode 100644
index 0000000..789c750
--- /dev/null
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/validation/ValidationIssuerPropertyProbe.java
@@ -0,0 +1,35 @@
+package org.oneedtech.inspect.vc.probe.validation;
+
+import org.oneedtech.inspect.core.probe.RunContext;
+import org.oneedtech.inspect.core.report.ReportItems;
+import org.oneedtech.inspect.vc.Validation;
+import org.oneedtech.inspect.vc.Validation.MessageLevel;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+public class ValidationIssuerPropertyProbe extends ValidationPropertyProbe {
+
+    public ValidationIssuerPropertyProbe(Validation validation) {
+        super(validation);
+    }
+
+    public ValidationIssuerPropertyProbe(Validation validation, boolean fullValidate) {
+        super(validation, fullValidate);
+    }
+
+    @Override
+    protected ReportItems validate(JsonNode node, RunContext ctx) {
+        if (!node.asText().matches("^http(s)?://")) {
+            return buildResponse("Issuer Profile " + node.toString() + " not hosted with HTTP-based identifier."  +
+                "Many platforms can only handle HTTP(s)-hosted issuers.", ctx);
+        }
+        return success(ctx);
+    }
+
+    private ReportItems buildResponse(String msg, RunContext ctx) {
+        if (validation.getMessageLevel() == MessageLevel.Warning) {
+            return warning(msg, ctx);
+        }
+        return error(msg, ctx);
+    }
+}
diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/validation/ValidationPropertyProbeFactory.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/validation/ValidationPropertyProbeFactory.java
index 195a8ac..243aa37 100644
--- a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/validation/ValidationPropertyProbeFactory.java
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/probe/validation/ValidationPropertyProbeFactory.java
@@ -2,8 +2,8 @@ package org.oneedtech.inspect.vc.probe.validation;
 
 import static org.oneedtech.inspect.util.code.Defensives.checkNotNull;
 
-import org.oneedtech.inspect.vc.Validation;
 import org.oneedtech.inspect.vc.Assertion.ValueType;
+import org.oneedtech.inspect.vc.Validation;
 
 /**
  * Factory for ValidationPropertyProbes
@@ -22,6 +22,9 @@ public class ValidationPropertyProbeFactory {
 		if (validation.getType() == ValueType.IMAGE) {
 			return new ValidationImagePropertyProbe(validation);
 		}
+		if (validation.getType() == ValueType.ISSUER) {
+			return new ValidationIssuerPropertyProbe(validation);
+		}
 		return new ValidationPropertyProbe(validation, fullValidate);
 	}
 }