diff --git a/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/ZohoAPIService.java b/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/ZohoAPIService.java
index 7c28bdd..4ec5d99 100644
--- a/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/ZohoAPIService.java
+++ b/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/ZohoAPIService.java
@@ -1,9 +1,11 @@
 package com.alexanderlogistics.zoho;
 
 import java.net.URI;
+import java.net.URLEncoder;
 import java.net.http.HttpClient;
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse;
+import java.nio.charset.StandardCharsets;
 import java.time.Duration;
 import java.util.List;
 import java.util.Locale;
@@ -14,8 +16,10 @@ import org.imixs.workflow.ItemCollection;
 import org.imixs.workflow.exceptions.PluginException;
 
 import com.alexanderlogistics.InvoiceUtil;
-import com.alexanderlogistics.zoho.dto.ZohoInvoiceDTO;
-import com.alexanderlogistics.zoho.dto.ZohoInvoiceItemDTO;
+import com.alexanderlogistics.zoho.dto.ZohoContact;
+import com.alexanderlogistics.zoho.dto.ZohoContactsResponse;
+import com.alexanderlogistics.zoho.dto.ZohoInvoice;
+import com.alexanderlogistics.zoho.dto.ZohoInvoiceItem;
 
 import jakarta.annotation.PostConstruct;
 import jakarta.annotation.security.DeclareRoles;
@@ -60,6 +64,57 @@ public class ZohoAPIService {
 
     }
 
+    public String findContactIDByCompanyName(String companyName, String accessToken) throws PluginException {
+
+        // Print JSON to console for verification
+        logger.info("├── Zoho getcontact Request...");
+        try {
+            // https://www.zohoapis.com/books/v3/contacts?organization_id=10234695&company_name=xxx'
+            String uri = ZOHO_API_BASE_URL + "contacts?organization_id="
+                    + zohoOAuthManager.getOrganization() + "&company_name="
+                    + URLEncoder.encode(companyName, StandardCharsets.UTF_8);
+            logger.info("│   ├──  uri= " + uri);
+            logger.fine("│   ├──  accessToken=" + accessToken);
+            HttpRequest request = HttpRequest.newBuilder()
+                    .uri(URI.create(uri))
+                    .header("Authorization", "Zoho-oauthtoken " + accessToken)
+                    .header("Content-Type", "application/json")
+                    .GET()
+                    .build();
+
+            HttpResponse<String> response = httpClient.send(
+                    request, HttpResponse.BodyHandlers.ofString());
+
+            // Print response details to console
+            logger.info("├── Zoho Response:");
+            logger.info("│   ├──  Status Code: " + response.statusCode());
+            logger.info("│   ├──  Response Body: " + response.body());
+
+            if (response.statusCode() >= 300) {
+                throw new PluginException(this.getClass().getName(), "Zoho API error",
+                        "Failed to find Contacts - Status code: " + response.statusCode() +
+                                ", Response: " + response.body());
+            }
+
+            ZohoContactsResponse contactsResponse = jsonb.fromJson(response.body(),
+                    ZohoContactsResponse.class);
+
+            if (contactsResponse != null && contactsResponse.getContacts() != null) {
+                // Durchsuche die Ergebnisse nach exakter Übereinstimmung
+                for (ZohoContact contact : contactsResponse.getContacts()) {
+                    if (companyName.equalsIgnoreCase(contact.getCompanyName())) {
+                        return contact.getContactId();
+                    }
+                }
+            }
+            return null;
+        } catch (Exception e) {
+            throw new PluginException(this.getClass().getName(), "Zoho API error",
+                    "Failed to find contacts", e);
+        }
+
+    }
+
     /**
      * Exports an invocie document
      * 
@@ -72,7 +127,7 @@ public class ZohoAPIService {
         String accessToken = zohoOAuthManager.getValidAccessToken();
 
         // Konvertiere ItemCollection zu ZohoInvoiceDTO
-        ZohoInvoiceDTO zohoInvoice = convertToZohoInvoice(invoice);
+        ZohoInvoice zohoInvoice = convertToZohoInvoice(invoice, accessToken);
 
         try {
             String requestBody = jsonb.toJson(zohoInvoice);
@@ -82,9 +137,10 @@ public class ZohoAPIService {
             logger.info("│   ├──  " + requestBody);
 
             // https://www.zohoapis.com/books/v3/invoices?organization_id=10234695'
-            String uri = ZOHO_API_BASE_URL + "invoices?organization_id=" + zohoOAuthManager.getOrganization();
+            String uri = ZOHO_API_BASE_URL + "invoices?organization_id="
+                    + zohoOAuthManager.getOrganization();
             logger.info("│   ├──  uri= " + uri);
-            logger.info("│   ├──  accessToken=" + accessToken);
+            logger.fine("│   ├──  accessToken=" + accessToken);
             HttpRequest request = HttpRequest.newBuilder()
                     .uri(URI.create(uri))
                     .header("Authorization", "Zoho-oauthtoken " + accessToken)
@@ -115,8 +171,77 @@ public class ZohoAPIService {
         }
     }
 
-    private ZohoInvoiceDTO convertToZohoInvoice(ItemCollection invoice) {
-        ZohoInvoiceDTO zohoInvoice = new ZohoInvoiceDTO();
+    /**
+     * Erstellt einen neuen Contact in Zoho Books
+     * 
+     * @param companyName Der Firmenname für den neuen Contact
+     * @return Der erstellte ZohoContact mit contact_id
+     * @throws PluginException Wenn der API-Aufruf fehlschlägt
+     */
+    public ZohoContact createContact(String companyName, String accessToken) throws PluginException {
+
+        try {
+            // Contact-DTO vorbereiten
+            ZohoContact newContact = new ZohoContact();
+            newContact.setContactName(companyName); // Wir verwenden den Firmennamen auch als Contact Name
+            newContact.setCompanyName(companyName);
+
+            // JSON serialisieren
+            String requestBody = jsonb.toJson(newContact);
+
+            logger.info("├── Zoho Contact Creation...");
+            logger.info("│   ├──  " + requestBody);
+
+            String uri = ZOHO_API_BASE_URL + "contacts?organization_id="
+                    + zohoOAuthManager.getOrganization();
+
+            HttpRequest request = HttpRequest.newBuilder()
+                    .uri(URI.create(uri))
+                    .header("Authorization", "Zoho-oauthtoken " + accessToken)
+                    .header("Content-Type", "application/json")
+                    .POST(HttpRequest.BodyPublishers.ofString(requestBody))
+                    .build();
+
+            HttpResponse<String> response = httpClient.send(
+                    request, HttpResponse.BodyHandlers.ofString());
+
+            logger.info("├── Zoho Response:");
+            logger.info("│   ├──  Status Code: " + response.statusCode());
+            logger.info("│   ├──  Response Body: " + response.body());
+
+            if (response.statusCode() == 201) {
+                // Erfolgreiche Erstellung
+                ZohoContact createResponse = jsonb.fromJson(response.body(), ZohoContact.class);
+                if (createResponse != null) {
+                    return createResponse;
+                }
+            }
+
+            throw new PluginException(this.getClass().getName(), "Zoho API error",
+                    "Failed to create contact. Status code: " + response.statusCode() +
+                            ", Response: " + response.body());
+
+        } catch (Exception e) {
+            throw new PluginException(this.getClass().getName(), "Zoho API error",
+                    "Failed to create contact", e);
+        }
+    }
+
+    private ZohoInvoice convertToZohoInvoice(ItemCollection invoice, String accessToken) throws PluginException {
+
+        // teste ob wir einen contact finden
+        String contactID = "";
+        try {
+            contactID = findContactIDByCompanyName(invoice.getItemValueString("dbtr.name"), accessToken);
+            if (contactID == null) {
+                ZohoContact contact = createContact(invoice.getItemValueString("dbtr.name"), accessToken);
+                contactID = contact.getContactId();
+            }
+        } catch (PluginException ef) {
+            logger.severe("Failed to find Contact by company name: " + ef.getMessage());
+        }
+
+        ZohoInvoice zohoInvoice = new ZohoInvoice();
 
         // Basisinformationen
         // zohoInvoice.setInvoiceNumber(invoice.getItemValueString("invoice.number"));
@@ -129,17 +254,17 @@ public class ZohoAPIService {
         zohoInvoice.setTotal(invoice.getItemValueDouble("invoice.total"));
 
         // Kunden-ID (muss angepasst werden je nachdem wie du sie speicherst)
-        // zohoInvoice.setCustomerId(invoice.getItemValueString("dbtr.number"));
-        zohoInvoice.setCustomerId("777249000000055569");
+        zohoInvoice.setCustomerId(contactID);
+        // zohoInvoice.setCustomerId("777249000000055569");
 
         // Positionen (muss angepasst werden je nach Datenstruktur)
         // List<ZohoInvoiceItemDTO> lineItems = new ArrayList<>();
         List<ItemCollection> positionen = InvoiceUtil.explodeChildList(invoice);
 
-        List<ZohoInvoiceItemDTO> lineItems = positionen.stream()
+        List<ZohoInvoiceItem> lineItems = positionen.stream()
                 .map(item -> {
                     ItemCollection itemCol = (ItemCollection) item;
-                    ZohoInvoiceItemDTO lineItem = new ZohoInvoiceItemDTO();
+                    ZohoInvoiceItem lineItem = new ZohoInvoiceItem();
                     lineItem.setName(itemCol.getItemValueString("datev.text"));
                     lineItem.setDescription(itemCol.getItemValueString("billingtext"));
                     lineItem.setRate(itemCol.getItemValueDouble("datev.umsatz"));
diff --git a/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoContact.java b/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoContact.java
new file mode 100644
index 0000000..d715136
--- /dev/null
+++ b/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoContact.java
@@ -0,0 +1,43 @@
+package com.alexanderlogistics.zoho.dto;
+
+import jakarta.json.bind.annotation.JsonbProperty;
+
+public class ZohoContact {
+
+    @JsonbProperty("contact_id")
+    private String contactId;
+
+    @JsonbProperty("contact_name")
+    private String contactName;
+
+    @JsonbProperty("company_name")
+    private String companyName;
+
+    // Weitere Felder nach Bedarf
+
+    // Getter und Setter
+    public String getContactId() {
+        return contactId;
+    }
+
+    public void setContactId(String contactId) {
+        this.contactId = contactId;
+    }
+
+    public String getContactName() {
+        return contactName;
+    }
+
+    public void setContactName(String contactName) {
+        this.contactName = contactName;
+    }
+
+    public String getCompanyName() {
+        return companyName;
+    }
+
+    public void setCompanyName(String companyName) {
+        this.companyName = companyName;
+    }
+
+}
diff --git a/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoContactsResponse.java b/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoContactsResponse.java
new file mode 100644
index 0000000..cf86850
--- /dev/null
+++ b/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoContactsResponse.java
@@ -0,0 +1,41 @@
+package com.alexanderlogistics.zoho.dto;
+
+import java.util.List;
+
+import jakarta.json.bind.annotation.JsonbProperty;
+
+public class ZohoContactsResponse {
+    @JsonbProperty("code")
+    private int code;
+
+    @JsonbProperty("message")
+    private String message;
+
+    @JsonbProperty("contacts")
+    private List<ZohoContact> contacts;
+
+    // Getter und Setter
+    public int getCode() {
+        return code;
+    }
+
+    public void setCode(int code) {
+        this.code = code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public List<ZohoContact> getContacts() {
+        return contacts;
+    }
+
+    public void setContacts(List<ZohoContact> contacts) {
+        this.contacts = contacts;
+    }
+}
diff --git a/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoiceDTO.java b/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoice.java
similarity index 86%
rename from office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoiceDTO.java
rename to office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoice.java
index 025faa7..c957598 100644
--- a/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoiceDTO.java
+++ b/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoice.java
@@ -5,13 +5,13 @@ import java.util.List;
 
 import jakarta.json.bind.annotation.JsonbProperty;
 
-public class ZohoInvoiceDTO {
+public class ZohoInvoice {
 
     private String customerId;
     private Date date;
     private Date dueDate;
     private String invoiceNumber;
-    private List<ZohoInvoiceItemDTO> lineItems;
+    private List<ZohoInvoiceItem> lineItems;
     private double total;
 
     // Getter und Setter
@@ -52,11 +52,11 @@ public class ZohoInvoiceDTO {
     }
 
     @JsonbProperty("line_items")
-    public List<ZohoInvoiceItemDTO> getLineItems() {
+    public List<ZohoInvoiceItem> getLineItems() {
         return lineItems;
     }
 
-    public void setLineItems(List<ZohoInvoiceItemDTO> lineItems) {
+    public void setLineItems(List<ZohoInvoiceItem> lineItems) {
         this.lineItems = lineItems;
     }
 
diff --git a/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoiceItemDTO.java b/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoiceItem.java
similarity index 96%
rename from office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoiceItemDTO.java
rename to office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoiceItem.java
index e5ebb6f..8971bd5 100644
--- a/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoiceItemDTO.java
+++ b/office-alexander-logistics-app/src/main/java/com/alexanderlogistics/zoho/dto/ZohoInvoiceItem.java
@@ -1,6 +1,6 @@
 package com.alexanderlogistics.zoho.dto;
 
-public class ZohoInvoiceItemDTO {
+public class ZohoInvoiceItem {
         private String name;
         private String description;
         private double rate;
diff --git a/office-alexander-logistics-app/src/main/webapp/pages/admin/zoho.xhtml b/office-alexander-logistics-app/src/main/webapp/pages/admin/zoho.xhtml
index 7e1112e..ec6009e 100644
--- a/office-alexander-logistics-app/src/main/webapp/pages/admin/zoho.xhtml
+++ b/office-alexander-logistics-app/src/main/webapp/pages/admin/zoho.xhtml
@@ -94,7 +94,7 @@
 												Generieren Sie einen neuen Access Code
 												<br />
 												Scope:
-												<code>ZohoBooks.invoices.CREATE,ZohoBooks.invoices.READ,ZohoBooks.invoices.UPDATE</code>
+												<code>zohocontacts.contactapi.ALL,ZohoBooks.invoices.CREATE,ZohoBooks.invoices.READ,ZohoBooks.invoices.UPDATE</code>
 											</li>
 											<li>
 												Code über den Button "Create" anfordern und in das Feld "Access Code"