diff --git a/src/YmlTransform/Exceptions/IncompleteTransformationException.cs b/src/YmlTransform/Exceptions/IncompleteTransformationException.cs
new file mode 100644
index 0000000..d72fe74
--- /dev/null
+++ b/src/YmlTransform/Exceptions/IncompleteTransformationException.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace YmlTransform.Exceptions
+{
+    public class IncompleteTransformationException : Exception
+    {
+        public IncompleteTransformationException()
+        { }
+
+        public IncompleteTransformationException(string message) : base(message)
+        { }
+    }
+}
diff --git a/src/YmlTransform/Models/TransformItem.cs b/src/YmlTransform/Models/TransformItem.cs
index 29aae94..499a7bb 100644
--- a/src/YmlTransform/Models/TransformItem.cs
+++ b/src/YmlTransform/Models/TransformItem.cs
@@ -4,11 +4,26 @@ namespace YmlTransform.Models
 {
     class TransformItem
     {
+        private string _value;
+        private bool _used;
+
         public string Path { get; set; }
         public string Type { get; set; }
         public string Languages { get; set; }
         public Guid FieldId { get; set; }
-        public string Value { get; set; }
+
+        public string Value
+        {
+            get
+            {
+                _used = true;
+                return _value;
+            }
+            set { _value = value; }
+        }
+
         public string Hint { get; set; }
+
+        public bool Used => _used;
     }
 }
\ No newline at end of file
diff --git a/src/YmlTransform/YmlTransform.csproj b/src/YmlTransform/YmlTransform.csproj
index 61e0a36..c287969 100644
--- a/src/YmlTransform/YmlTransform.csproj
+++ b/src/YmlTransform/YmlTransform.csproj
@@ -83,6 +83,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Exceptions\IncompleteTransformationException.cs" />
     <Compile Include="ReflectionHelper.cs" />
     <Compile Include="Models\Options.cs" />
     <Compile Include="Program.cs" />
diff --git a/src/YmlTransform/YmlTransformer.cs b/src/YmlTransform/YmlTransformer.cs
index 9864aee..7eaba5b 100644
--- a/src/YmlTransform/YmlTransformer.cs
+++ b/src/YmlTransform/YmlTransformer.cs
@@ -5,6 +5,7 @@
 using Rainbow.Model;
 using Rainbow.Storage.Yaml;
 using Rainbow.Storage.Yaml.OutputModel;
+using YmlTransform.Exceptions;
 using YmlTransform.Models;
 
 namespace YmlTransform
@@ -93,6 +94,10 @@ private static void TransformSingle(List<TransformItem> transformations, string
                     }
                 }
 
+                if (!transformations.All(x => x.Used))
+                {
+                    throw new IncompleteTransformationException();
+                }
 
                 if (transformed)
                 {
diff --git a/tests/YmlTransform.Tests/Data/MissingTransformation.yml b/tests/YmlTransform.Tests/Data/MissingTransformation.yml
new file mode 100644
index 0000000..b48f519
--- /dev/null
+++ b/tests/YmlTransform.Tests/Data/MissingTransformation.yml
@@ -0,0 +1,25 @@
+---
+ID: "ab5b233c-111c-4fa8-affe-b0c7315fedf4"
+Parent: "756fff26-90f2-4889-bace-da656e66b9c1"
+Template: "013bc834-c0f6-4377-924e-0de185abfbe7"
+Path: /sitecore/content/Home/Unversioned
+DB: master
+SharedFields:
+- ID: "ba3f86a2-4a1c-4d78-b63d-91c2779c1b5e"
+  Hint: __Sortorder
+  Value: 375
+Languages:
+- Language: en
+  Fields:
+  - ID: "11c0c7c6-673f-432a-b2fa-acfead30b6dd"
+    Hint: Field1
+    Value: "Value1"
+  - ID: "814e27bf-7ae2-433c-affa-aafc0797e0a8"
+    Hint: Field2
+    Value: "Value2"
+Versions:
+  - Version: 1
+    Fields:
+    - ID: "25bed78c-4957-4165-998a-ca1b52f67497"
+      Hint: __Created
+      Value: 20171016T073039Z
\ No newline at end of file
diff --git a/tests/YmlTransform.Tests/Data/MissingTransformation.ymltransform b/tests/YmlTransform.Tests/Data/MissingTransformation.ymltransform
new file mode 100644
index 0000000..020d020
--- /dev/null
+++ b/tests/YmlTransform.Tests/Data/MissingTransformation.ymltransform
@@ -0,0 +1,18 @@
+[
+    {
+        "FieldId": "11c0c7c6-673f-432a-b2fa-acfead30b6dd",
+        "Hint": "Field1",
+        "Languages": "*",
+        "Path": "/sitecore/content/Home/Unversioned",
+        "Type": "Unversioned",
+        "Value": "Value1New"
+    },
+    {
+        "FieldId": "714e27bf-7ae2-433c-affa-aafc0797e0a8",
+        "Hint": "Field3",
+        "Languages": "*",
+        "Path": "/sitecore/content/Home/Unversioned",
+        "Type": "Unversioned",
+        "Value": "Value2New"
+    }
+]
\ No newline at end of file
diff --git a/tests/YmlTransform.Tests/YmlTransform.Tests.csproj b/tests/YmlTransform.Tests/YmlTransform.Tests.csproj
index 8ea5b54..57f3ea0 100644
--- a/tests/YmlTransform.Tests/YmlTransform.Tests.csproj
+++ b/tests/YmlTransform.Tests/YmlTransform.Tests.csproj
@@ -39,6 +39,9 @@
     <Reference Include="System" />
     <Reference Include="System.ComponentModel.Composition" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Linq, Version=4.1.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\System.Linq.4.3.0\lib\net463\System.Linq.dll</HintPath>
+    </Reference>
     <Reference Include="System.Reflection, Version=4.1.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\..\packages\System.Reflection.4.3.0\lib\net462\System.Reflection.dll</HintPath>
     </Reference>
@@ -80,6 +83,12 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />
+    <None Include="Data\MissingTransformation.yml">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Include="Data\MissingTransformation.ymltransform">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Include="Data\Unversioned.yml">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
diff --git a/tests/YmlTransform.Tests/YmlTransformerTests.cs b/tests/YmlTransform.Tests/YmlTransformerTests.cs
index 0089872..2d19740 100644
--- a/tests/YmlTransform.Tests/YmlTransformerTests.cs
+++ b/tests/YmlTransform.Tests/YmlTransformerTests.cs
@@ -4,6 +4,7 @@
 using System.Text;
 using System.Threading;
 using Xunit;
+using YmlTransform.Exceptions;
 
 namespace YmlTransform.Tests
 {
@@ -38,5 +39,13 @@ public void TestUnversionedTransformation()
 
             Assert.Equal(expectedHash, originalHash);
         }
+
+        [Fact]
+        public void TestExceptionThrownOnIncompleteTransform()
+        {
+            const string originalFile = @"Data\\MissingTransformation.yml";
+
+            Assert.Throws<IncompleteTransformationException>(() => YmlTransformer.TransformFile(originalFile, "Data\\MissingTransformation.ymltransform"));
+        }
     }
 }
diff --git a/tests/YmlTransform.Tests/packages.config b/tests/YmlTransform.Tests/packages.config
index 11abced..c33d62c 100644
--- a/tests/YmlTransform.Tests/packages.config
+++ b/tests/YmlTransform.Tests/packages.config
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="System.Linq" version="4.3.0" targetFramework="net47" />
   <package id="System.Reflection" version="4.3.0" targetFramework="net47" />
   <package id="System.Runtime" version="4.3.0" targetFramework="net47" />
   <package id="System.Runtime.Extensions" version="4.3.0" targetFramework="net47" />