diff --git a/src/main/java/de/avatic/lcc/service/bulk/BulkImportService.java b/src/main/java/de/avatic/lcc/service/bulk/BulkImportService.java
index 8dba972..bcfdbbb 100644
--- a/src/main/java/de/avatic/lcc/service/bulk/BulkImportService.java
+++ b/src/main/java/de/avatic/lcc/service/bulk/BulkImportService.java
@@ -58,9 +58,16 @@ public class BulkImportService {
         try (Workbook workbook = new XSSFWorkbook(in)) {
             Sheet sheet = workbook.getSheet(BulkFileTypes.valueOf(type.name()).getSheetName());
 
-            if(sheet == null)
+            if (sheet == null) {
+
+                BulkFileTypes foundType = findSheetType(workbook.getSheetAt(0));
+
+                if(foundType != null && !foundType.equals(BulkFileTypes.valueOf(type.name())))
+                    throw new ExcelValidationError("Unable to import " + op.getFileType().getFileType() + ", because " + foundType.getSheetName() + " template was found");
+
                 throw new ExcelValidationError("Unable to import " + op.getFileType().getFileType() + ", because \"" + BulkFileTypes.valueOf(type.name()).getSheetName() + "\" sheet is missing. Please use correct template.");
 
+            }
 
             switch (type) {
                 case CONTAINER_RATE:
@@ -92,5 +99,25 @@ public class BulkImportService {
 
     }
 
+    private BulkFileTypes findSheetType(Sheet sheet) {
+
+        if(containerRateExcelMapper.isSheet(sheet))
+            return BulkFileTypes.CONTAINER_RATE;
+
+        if(matrixRateExcelMapper.isSheet(sheet))
+            return BulkFileTypes.COUNTRY_MATRIX;
+
+        if(materialExcelMapper.isSheet(sheet))
+            return BulkFileTypes.MATERIAL;
+
+        if(packagingExcelMapper.isSheet(sheet))
+            return BulkFileTypes.PACKAGING;
+
+        if(nodeExcelMapper.isSheet(sheet))
+            return BulkFileTypes.NODE;
+
+        return null;
+    }
+
 
 }
diff --git a/src/main/java/de/avatic/lcc/service/excelMapper/ContainerRateExcelMapper.java b/src/main/java/de/avatic/lcc/service/excelMapper/ContainerRateExcelMapper.java
index bba5291..4c2124d 100644
--- a/src/main/java/de/avatic/lcc/service/excelMapper/ContainerRateExcelMapper.java
+++ b/src/main/java/de/avatic/lcc/service/excelMapper/ContainerRateExcelMapper.java
@@ -64,6 +64,15 @@ public class ContainerRateExcelMapper {
 
     }
 
+    public boolean isSheet(Sheet sheet) {
+        try {
+            headerGenerator.validateHeader(sheet, ContainerRateHeader.class);
+        } catch (ExcelValidationError e) {
+            return false;
+        }
+        return true;
+    }
+
     public List<ContainerRate> extractSheet(Sheet sheet) {
         headerGenerator.validateHeader(sheet, ContainerRateHeader.class);
 
@@ -108,12 +117,12 @@ public class ContainerRateExcelMapper {
         var fromNode = nodeRepository.getByExternalMappingId(row.getCell(ContainerRateHeader.FROM_NODE.ordinal()).getStringCellValue());
         var toNode = nodeRepository.getByExternalMappingId(row.getCell(ContainerRateHeader.TO_NODE.ordinal()).getStringCellValue());
 
-        if(fromNode.isEmpty() || fromNode.get().getDeprecated()) {
-            throw new ExcelValidationError("Unable to validate row " + (row.getRowNum() + 1) + " column " + toExcelLetter( ContainerRateHeader.FROM_NODE.ordinal()) + ": Node with mapping id " + row.getCell(ContainerRateHeader.FROM_NODE.ordinal()).getStringCellValue() + " not found.");
+        if (fromNode.isEmpty() || fromNode.get().getDeprecated()) {
+            throw new ExcelValidationError("Unable to validate row " + (row.getRowNum() + 1) + " column " + toExcelLetter(ContainerRateHeader.FROM_NODE.ordinal()) + ": Node with mapping id " + row.getCell(ContainerRateHeader.FROM_NODE.ordinal()).getStringCellValue() + " not found.");
         }
 
-        if(toNode.isEmpty() || toNode.get().getDeprecated()) {
-            throw new ExcelValidationError("Unable to validate row " + (row.getRowNum() + 1) + " column " + toExcelLetter( ContainerRateHeader.TO_NODE.ordinal()) + ": Node with mapping id " + row.getCell(ContainerRateHeader.TO_NODE.ordinal()).getStringCellValue() + " not found.");
+        if (toNode.isEmpty() || toNode.get().getDeprecated()) {
+            throw new ExcelValidationError("Unable to validate row " + (row.getRowNum() + 1) + " column " + toExcelLetter(ContainerRateHeader.TO_NODE.ordinal()) + ": Node with mapping id " + row.getCell(ContainerRateHeader.TO_NODE.ordinal()).getStringCellValue() + " not found.");
         }
 
         entity.setFromNodeId(fromNode.orElseThrow().getId());
diff --git a/src/main/java/de/avatic/lcc/service/excelMapper/MaterialExcelMapper.java b/src/main/java/de/avatic/lcc/service/excelMapper/MaterialExcelMapper.java
index 3d6f10b..22b1b92 100644
--- a/src/main/java/de/avatic/lcc/service/excelMapper/MaterialExcelMapper.java
+++ b/src/main/java/de/avatic/lcc/service/excelMapper/MaterialExcelMapper.java
@@ -3,11 +3,13 @@ package de.avatic.lcc.service.excelMapper;
 import de.avatic.lcc.model.bulk.BulkInstruction;
 import de.avatic.lcc.model.bulk.BulkInstructionType;
 import de.avatic.lcc.model.bulk.header.MaterialHeader;
+import de.avatic.lcc.model.bulk.header.MatrixRateHeader;
 import de.avatic.lcc.model.bulk.header.NodeHeader;
 import de.avatic.lcc.model.materials.Material;
 import de.avatic.lcc.repositories.MaterialRepository;
 import de.avatic.lcc.service.bulk.helper.ConstraintGenerator;
 import de.avatic.lcc.service.bulk.helper.HeaderGenerator;
+import de.avatic.lcc.util.exception.internalerror.ExcelValidationError;
 import org.apache.poi.ss.usermodel.*;
 import org.springframework.stereotype.Service;
 
@@ -53,6 +55,15 @@ public class MaterialExcelMapper {
 
     }
 
+    public boolean isSheet(Sheet sheet) {
+        try {
+            headerGenerator.validateHeader(sheet, MaterialHeader.class);
+        } catch (ExcelValidationError e) {
+            return false;
+        }
+        return true;
+    }
+
     public List<BulkInstruction<Material>> extractSheet(Sheet sheet) {
         headerGenerator.validateHeader(sheet, MaterialHeader.class);
 
diff --git a/src/main/java/de/avatic/lcc/service/excelMapper/MatrixRateExcelMapper.java b/src/main/java/de/avatic/lcc/service/excelMapper/MatrixRateExcelMapper.java
index 9da5b57..cb9d014 100644
--- a/src/main/java/de/avatic/lcc/service/excelMapper/MatrixRateExcelMapper.java
+++ b/src/main/java/de/avatic/lcc/service/excelMapper/MatrixRateExcelMapper.java
@@ -1,6 +1,7 @@
 package de.avatic.lcc.service.excelMapper;
 
 import de.avatic.lcc.model.bulk.HiddenTableType;
+import de.avatic.lcc.model.bulk.header.ContainerRateHeader;
 import de.avatic.lcc.model.bulk.header.HiddenCountryHeader;
 import de.avatic.lcc.model.bulk.header.MatrixRateHeader;
 import de.avatic.lcc.model.country.IsoCode;
@@ -9,6 +10,7 @@ import de.avatic.lcc.repositories.country.CountryRepository;
 import de.avatic.lcc.repositories.rates.MatrixRateRepository;
 import de.avatic.lcc.service.bulk.helper.ConstraintGenerator;
 import de.avatic.lcc.service.bulk.helper.HeaderGenerator;
+import de.avatic.lcc.util.exception.internalerror.ExcelValidationError;
 import org.apache.poi.ss.usermodel.*;
 import org.springframework.stereotype.Service;
 
@@ -37,6 +39,15 @@ public class MatrixRateExcelMapper {
         headerGenerator.fixWidth(sheet, MatrixRateHeader.class);
     }
 
+    public boolean isSheet(Sheet sheet) {
+        try {
+            headerGenerator.validateHeader(sheet, MatrixRateHeader.class);
+        } catch (ExcelValidationError e) {
+            return false;
+        }
+        return true;
+    }
+
     public List<MatrixRate> extractSheet(Sheet sheet) {
         headerGenerator.validateHeader(sheet, MatrixRateHeader.class);
 
diff --git a/src/main/java/de/avatic/lcc/service/excelMapper/NodeExcelMapper.java b/src/main/java/de/avatic/lcc/service/excelMapper/NodeExcelMapper.java
index 16ea92b..5777334 100644
--- a/src/main/java/de/avatic/lcc/service/excelMapper/NodeExcelMapper.java
+++ b/src/main/java/de/avatic/lcc/service/excelMapper/NodeExcelMapper.java
@@ -6,6 +6,7 @@ import de.avatic.lcc.model.bulk.BulkInstructionType;
 import de.avatic.lcc.model.bulk.HiddenTableType;
 import de.avatic.lcc.model.bulk.header.HiddenCountryHeader;
 import de.avatic.lcc.model.bulk.header.NodeHeader;
+import de.avatic.lcc.model.bulk.header.PackagingHeader;
 import de.avatic.lcc.model.country.Country;
 import de.avatic.lcc.model.country.IsoCode;
 import de.avatic.lcc.model.nodes.Node;
@@ -93,6 +94,15 @@ public class NodeExcelMapper {
 
     }
 
+    public boolean isSheet(Sheet sheet) {
+        try {
+            headerGenerator.validateHeader(sheet, NodeHeader.class);
+        } catch (ExcelValidationError e) {
+            return false;
+        }
+        return true;
+    }
+
     public List<BulkInstruction<ExcelNode>> extractSheet(Sheet sheet) {
         headerGenerator.validateHeader(sheet, NodeHeader.class);
 
diff --git a/src/main/java/de/avatic/lcc/service/excelMapper/PackagingExcelMapper.java b/src/main/java/de/avatic/lcc/service/excelMapper/PackagingExcelMapper.java
index 0dbfe40..e2d3ad3 100644
--- a/src/main/java/de/avatic/lcc/service/excelMapper/PackagingExcelMapper.java
+++ b/src/main/java/de/avatic/lcc/service/excelMapper/PackagingExcelMapper.java
@@ -6,6 +6,7 @@ import de.avatic.lcc.model.bulk.BulkInstruction;
 import de.avatic.lcc.model.bulk.BulkInstructionType;
 import de.avatic.lcc.model.bulk.HiddenTableType;
 import de.avatic.lcc.model.bulk.header.HiddenNodeHeader;
+import de.avatic.lcc.model.bulk.header.MaterialHeader;
 import de.avatic.lcc.model.bulk.header.PackagingHeader;
 import de.avatic.lcc.model.packaging.Packaging;
 import de.avatic.lcc.model.packaging.PackagingDimension;
@@ -19,6 +20,7 @@ import de.avatic.lcc.repositories.packaging.PackagingPropertiesRepository;
 import de.avatic.lcc.repositories.packaging.PackagingRepository;
 import de.avatic.lcc.service.bulk.helper.ConstraintGenerator;
 import de.avatic.lcc.service.bulk.helper.HeaderGenerator;
+import de.avatic.lcc.util.exception.internalerror.ExcelValidationError;
 import org.apache.poi.ss.usermodel.*;
 import org.springframework.stereotype.Service;
 
@@ -132,6 +134,15 @@ public class PackagingExcelMapper {
 
     }
 
+    public boolean isSheet(Sheet sheet) {
+        try {
+            headerGenerator.validateHeader(sheet, PackagingHeader.class);
+        } catch (ExcelValidationError e) {
+            return false;
+        }
+        return true;
+    }
+
     public List<BulkInstruction<ExcelPackaging>> extractSheet(Sheet sheet) {
         headerGenerator.validateHeader(sheet, PackagingHeader.class);
         Map<Integer, String> propertyMappingIds = getPropertyHeaders(sheet.getRow(0));