diff --git a/changes.md b/changes.md
index 36c7ab98765..be933fc483c 100644
--- a/changes.md
+++ b/changes.md
@@ -1,3 +1,20 @@
+**Api changes**
+
+<details>
+<summary>Added Property(s)</summary>
+
+- added property `attributedTo` to type `CreatedBy`
+- added property `attributedTo` to type `LastModifiedBy`
+</details>
+
+
+<details>
+<summary>Added Type(s)</summary>
+
+- added type `Attribution`
+- added type `AttributionSource`
+</details>
+
 **Import changes**
 
 <details>
diff --git a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/Attribution.cs b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/Attribution.cs
new file mode 100644
index 00000000000..41c5eb2a1ba
--- /dev/null
+++ b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/Attribution.cs
@@ -0,0 +1,10 @@
+namespace commercetools.Sdk.Api.Models.Common
+{
+
+    public partial class Attribution : IAttribution
+    {
+        public string ClientId { get; set; }
+
+        public IAttributionSource Source { get; set; }
+    }
+}
diff --git a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/AttributionSource.cs b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/AttributionSource.cs
new file mode 100644
index 00000000000..03af797e3f8
--- /dev/null
+++ b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/AttributionSource.cs
@@ -0,0 +1,64 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using commercetools.Base.CustomAttributes;
+using commercetools.Base.Models;
+
+// ReSharper disable CheckNamespace
+namespace commercetools.Sdk.Api.Models.Common
+{
+    public enum AttributionSource
+    {
+        [Description("Import")]
+        Import,
+
+        [Description("Export")]
+        Export
+    }
+
+    public class AttributionSourceWrapper : IAttributionSource
+    {
+        public string JsonName { get; internal set; }
+        public AttributionSource? Value { get; internal set; }
+        public override string ToString()
+        {
+            return JsonName;
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+        public new IEnumerator<char> GetEnumerator()
+        {
+            return JsonName.GetEnumerator();
+        }
+    }
+
+    [EnumInterfaceCreator(typeof(IAttributionSource), "FindEnum")]
+    public interface IAttributionSource : IJsonName, IEnumerable<char>
+    {
+        public static IAttributionSource Import = new AttributionSourceWrapper
+        { Value = AttributionSource.Import, JsonName = "Import" };
+
+        public static IAttributionSource Export = new AttributionSourceWrapper
+        { Value = AttributionSource.Export, JsonName = "Export" };
+
+        AttributionSource? Value { get; }
+
+        static IAttributionSource[] Values()
+        {
+            return new[]
+            {
+                 Import ,
+                 Export
+             };
+        }
+        static IAttributionSource FindEnum(string value)
+        {
+            return Values().FirstOrDefault(origin => origin.JsonName == value) ?? new AttributionSourceWrapper() { JsonName = value };
+        }
+    }
+}
diff --git a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/CreatedBy.cs b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/CreatedBy.cs
index 95ae99f8c86..3b41066fe29 100644
--- a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/CreatedBy.cs
+++ b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/CreatedBy.cs
@@ -15,5 +15,7 @@ public partial class CreatedBy : ICreatedBy
         public string AnonymousId { get; set; }
 
         public ICustomerReference Associate { get; set; }
+
+        public IAttribution AttributedTo { get; set; }
     }
 }
diff --git a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/IAttribution.cs b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/IAttribution.cs
new file mode 100644
index 00000000000..ca1c762a8fb
--- /dev/null
+++ b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/IAttribution.cs
@@ -0,0 +1,14 @@
+using commercetools.Base.CustomAttributes;
+
+// ReSharper disable CheckNamespace
+namespace commercetools.Sdk.Api.Models.Common
+{
+    [DeserializeAs(typeof(commercetools.Sdk.Api.Models.Common.Attribution))]
+    public partial interface IAttribution
+    {
+        string ClientId { get; set; }
+
+        IAttributionSource Source { get; set; }
+
+    }
+}
diff --git a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/ICreatedBy.cs b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/ICreatedBy.cs
index 3423c25bb19..41107ba5b6a 100644
--- a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/ICreatedBy.cs
+++ b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/ICreatedBy.cs
@@ -15,6 +15,8 @@ public partial interface ICreatedBy : IClientLogging
 
         new string AnonymousId { get; set; }
 
+        IAttribution AttributedTo { get; set; }
+
         new ICustomerReference Associate { get; set; }
 
     }
diff --git a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/ILastModifiedBy.cs b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/ILastModifiedBy.cs
index dba3e79f2f9..1cd370861e1 100644
--- a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/ILastModifiedBy.cs
+++ b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/ILastModifiedBy.cs
@@ -15,6 +15,8 @@ public partial interface ILastModifiedBy : IClientLogging
 
         new string AnonymousId { get; set; }
 
+        IAttribution AttributedTo { get; set; }
+
         new ICustomerReference Associate { get; set; }
 
     }
diff --git a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/LastModifiedBy.cs b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/LastModifiedBy.cs
index 54482060a14..8e84a49832c 100644
--- a/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/LastModifiedBy.cs
+++ b/commercetools.Sdk/commercetools.Sdk.Api/Generated/Models/Common/LastModifiedBy.cs
@@ -15,5 +15,7 @@ public partial class LastModifiedBy : ILastModifiedBy
         public string AnonymousId { get; set; }
 
         public ICustomerReference Associate { get; set; }
+
+        public IAttribution AttributedTo { get; set; }
     }
 }
diff --git a/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/AttributionQueryBuilderDsl.cs b/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/AttributionQueryBuilderDsl.cs
new file mode 100644
index 00000000000..28dd84ec00e
--- /dev/null
+++ b/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/AttributionQueryBuilderDsl.cs
@@ -0,0 +1,30 @@
+// ReSharper disable CheckNamespace
+namespace commercetools.Sdk.Api.Predicates.Query.Common
+{
+
+    public partial class AttributionQueryBuilderDsl
+    {
+        public AttributionQueryBuilderDsl()
+        {
+        }
+
+        public static AttributionQueryBuilderDsl Of()
+        {
+            return new AttributionQueryBuilderDsl();
+        }
+
+        public IComparisonPredicateBuilder<AttributionQueryBuilderDsl, string> ClientId()
+        {
+            return new ComparisonPredicateBuilder<AttributionQueryBuilderDsl, string>(BinaryQueryPredicate.Of().Left(new ConstantQueryPredicate("clientId")),
+            p => new CombinationQueryPredicate<AttributionQueryBuilderDsl>(p, AttributionQueryBuilderDsl.Of),
+            PredicateFormatter.Format);
+        }
+        public IComparisonPredicateBuilder<AttributionQueryBuilderDsl, string> Source()
+        {
+            return new ComparisonPredicateBuilder<AttributionQueryBuilderDsl, string>(BinaryQueryPredicate.Of().Left(new ConstantQueryPredicate("source")),
+            p => new CombinationQueryPredicate<AttributionQueryBuilderDsl>(p, AttributionQueryBuilderDsl.Of),
+            PredicateFormatter.Format);
+        }
+
+    }
+}
diff --git a/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/CreatedByQueryBuilderDsl.cs b/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/CreatedByQueryBuilderDsl.cs
index 8dce5d79cf6..9d5f6ab89a3 100644
--- a/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/CreatedByQueryBuilderDsl.cs
+++ b/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/CreatedByQueryBuilderDsl.cs
@@ -51,6 +51,15 @@ public CombinationQueryPredicate<CreatedByQueryBuilderDsl> Associate(
                 CreatedByQueryBuilderDsl.Of);
         }
 
+        public CombinationQueryPredicate<CreatedByQueryBuilderDsl> AttributedTo(
+            Func<commercetools.Sdk.Api.Predicates.Query.Common.AttributionQueryBuilderDsl, CombinationQueryPredicate<commercetools.Sdk.Api.Predicates.Query.Common.AttributionQueryBuilderDsl>> fn)
+        {
+            return new CombinationQueryPredicate<CreatedByQueryBuilderDsl>(ContainerQueryPredicate.Of()
+                .Parent(ConstantQueryPredicate.Of().Constant("attributedTo"))
+                .Inner(fn.Invoke(commercetools.Sdk.Api.Predicates.Query.Common.AttributionQueryBuilderDsl.Of())),
+                CreatedByQueryBuilderDsl.Of);
+        }
+
 
     }
 }
diff --git a/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/LastModifiedByQueryBuilderDsl.cs b/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/LastModifiedByQueryBuilderDsl.cs
index 46d0b80b9cb..f2ec6a5e7d6 100644
--- a/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/LastModifiedByQueryBuilderDsl.cs
+++ b/commercetools.Sdk/commercetools.Sdk.Api/Predicates/Query/Generated/Common/LastModifiedByQueryBuilderDsl.cs
@@ -51,6 +51,15 @@ public CombinationQueryPredicate<LastModifiedByQueryBuilderDsl> Associate(
                 LastModifiedByQueryBuilderDsl.Of);
         }
 
+        public CombinationQueryPredicate<LastModifiedByQueryBuilderDsl> AttributedTo(
+            Func<commercetools.Sdk.Api.Predicates.Query.Common.AttributionQueryBuilderDsl, CombinationQueryPredicate<commercetools.Sdk.Api.Predicates.Query.Common.AttributionQueryBuilderDsl>> fn)
+        {
+            return new CombinationQueryPredicate<LastModifiedByQueryBuilderDsl>(ContainerQueryPredicate.Of()
+                .Parent(ConstantQueryPredicate.Of().Constant("attributedTo"))
+                .Inner(fn.Invoke(commercetools.Sdk.Api.Predicates.Query.Common.AttributionQueryBuilderDsl.Of())),
+                LastModifiedByQueryBuilderDsl.Of);
+        }
+
 
     }
 }
diff --git a/commercetools.Sdk/commercetools.Sdk.GraphQL.Api/schema.graphqls b/commercetools.Sdk/commercetools.Sdk.GraphQL.Api/schema.graphqls
index bacdc9a8b6d..8741258ea1b 100644
--- a/commercetools.Sdk/commercetools.Sdk.GraphQL.Api/schema.graphqls
+++ b/commercetools.Sdk/commercetools.Sdk.GraphQL.Api/schema.graphqls
@@ -1213,6 +1213,17 @@ input AttributeTypeDraft {
   ltext: SimpleAttributeTypeDraft
 }
 
+type Attribution {
+  clientId: String
+  source: AttributionSource!
+  userRef: Reference
+}
+
+enum AttributionSource {
+  Export
+  Import
+}
+
 "AuthenticationMode values."
 enum AuthenticationMode {
   ExternalAuth
@@ -4672,6 +4683,7 @@ type Initiator {
   isPlatformClient: Boolean
   externalUserId: String
   anonymousId: String
+  attributedTo: Attribution
   clientId: String
   customerRef: Reference
   userRef: Reference
diff --git a/references.txt b/references.txt
index 1d4e829ab88..b7bac63bd03 100644
--- a/references.txt
+++ b/references.txt
@@ -234,3 +234,4 @@ d6c4e8ca039647373df3aeb8369342bd50b02d61
 c19a4123795d7a2d583abb9f278ce1264b030a91
 9194bacd1d05947096d049eb383656c8d7f30812
 cec3e86fa69d9a68a2add55c132e2ffff406a294
+a9d748dbcbfc8d2a1cd8d0f8c4e48807e502e79e