diff --git a/core/src/main/java/de/srsoftware/umbrella/core/model/Document.java b/core/src/main/java/de/srsoftware/umbrella/core/model/Document.java
index 8aceb29..96973f2 100644
--- a/core/src/main/java/de/srsoftware/umbrella/core/model/Document.java
+++ b/core/src/main/java/de/srsoftware/umbrella/core/model/Document.java
@@ -169,6 +169,13 @@ public final class Document implements Mappable {
 		return !dirtyFields.isEmpty() || sender.isDirty() || customer.isDirty();
 	}
 
+	public boolean isDirty(String ... fields){
+		for (var field : fields){
+			if (dirtyFields.contains(field)) return true;
+		}
+		return false;
+	}
+
 	public boolean isNew(){
 		return dirtyFields.contains(ID);
 	}
diff --git a/documents/src/main/java/de/srsoftware/umbrella/documents/DocumentApi.java b/documents/src/main/java/de/srsoftware/umbrella/documents/DocumentApi.java
index 6be32ad..1c7b310 100644
--- a/documents/src/main/java/de/srsoftware/umbrella/documents/DocumentApi.java
+++ b/documents/src/main/java/de/srsoftware/umbrella/documents/DocumentApi.java
@@ -411,7 +411,13 @@ public class DocumentApi extends BaseHandler implements DocumentService {
 
 	private boolean patchDocument(long docId, UmbrellaUser user, HttpExchange ex) throws UmbrellaException, IOException {
 		var doc = getDocument(docId,user).a;
-		doc.patch(json(ex));
+		var data = json(ex);
+		doc.patch(data);
+		if (doc.isDirty(FIELD_FOOTER,FIELD_HEAD)) {
+			var settings = db.getCustomerSettings(doc.companyId(),doc.type(),doc.customer().id());
+			if (settings == null) settings = CustomerSettings.empty();
+			db.save(doc.companyId(),doc.type(),doc.customer().id(), settings.patch(data));
+		}
 		db.save(doc);
 		return ok(ex);
 	}
diff --git a/documents/src/main/java/de/srsoftware/umbrella/documents/SqliteDb.java b/documents/src/main/java/de/srsoftware/umbrella/documents/SqliteDb.java
index 8b3a95f..1c82f82 100644
--- a/documents/src/main/java/de/srsoftware/umbrella/documents/SqliteDb.java
+++ b/documents/src/main/java/de/srsoftware/umbrella/documents/SqliteDb.java
@@ -556,6 +556,7 @@ CREATE TABLE IF NOT EXISTS {0} ( {1} VARCHAR(255) PRIMARY KEY, {2} VARCHAR(255)
 
 	@Override
 	public CustomerSettings save(long companyId, Type docType, String customerId, CustomerSettings settings) throws UmbrellaException {
+		if (!settings.isDirty()) return settings;
 		try {
 			replaceInto(TABLE_CUSTOMER_SETTINGS,FIELD_COMPANY_ID,FIELD_DOC_TYPE_ID,FIELD_CUSTOMER_NUMBER,FIELD_DEFAULT_HEADER,FIELD_DEFAULT_FOOTER,FIELD_DEFAULT_MAIL)
 					.values(companyId,docType.id(),customerId,settings.header(),settings.footer(),settings.mailText())
diff --git a/documents/src/main/java/de/srsoftware/umbrella/documents/model/CustomerSettings.java b/documents/src/main/java/de/srsoftware/umbrella/documents/model/CustomerSettings.java
index ac3a771..e2b392a 100644
--- a/documents/src/main/java/de/srsoftware/umbrella/documents/model/CustomerSettings.java
+++ b/documents/src/main/java/de/srsoftware/umbrella/documents/model/CustomerSettings.java
@@ -3,14 +3,50 @@ package de.srsoftware.umbrella.documents.model;
 
 
 import static de.srsoftware.umbrella.core.Constants.*;
-import static de.srsoftware.umbrella.documents.Constants.*;
 
 import de.srsoftware.tools.Mappable;
+import org.json.JSONObject;
+
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.util.HashSet;
 import java.util.Map;
 
-public record CustomerSettings(String header, String footer, String mailText) implements Mappable {
+public class CustomerSettings implements Mappable {
+	private static final System.Logger LOG = System.getLogger(CustomerSettings.class.getSimpleName());
+	private String footer, header, mailText;
+	private HashSet<String> dirtyFields = new HashSet<>();
+
+	public CustomerSettings(String header, String footer, String mailText){
+		this.header = header;
+		this.footer = footer;
+		this.mailText = mailText;
+	}
+
+	public CustomerSettings clear(){
+		dirtyFields.clear();
+		return this;
+	}
+	public static CustomerSettings empty() {
+		return new CustomerSettings("","","");
+	}
+
+	public String footer(){
+		return footer;
+	}
+
+	public String header() {
+		return header;
+	}
+
+	public boolean isDirty() {
+		return !dirtyFields.isEmpty();
+	}
+
+	public String mailText(){
+		return mailText;
+	}
+
 	public static CustomerSettings of(ResultSet rs) throws SQLException {
 		var header = rs.getString(FIELD_DEFAULT_HEADER);
 		var footer = rs.getString(FIELD_DEFAULT_FOOTER);
@@ -18,12 +54,24 @@ public record CustomerSettings(String header, String footer, String mailText) im
 		return new CustomerSettings(header,footer,mailText);
 	}
 
-	public static CustomerSettings empty() {
-		return new CustomerSettings("","","");
-	}
-
 	@Override
 	public Map<String, Object> toMap() {
 		return Map.of(FIELD_FOOTER,footer,FIELD_HEAD,header,CONTENT,mailText);
 	}
+
+	public CustomerSettings patch(JSONObject json) {
+		for (var key : json.keySet()){
+			var valid = true;
+			switch (key){
+				case FIELD_FOOTER:
+					footer = json.getString(key); break;
+				case FIELD_HEAD:
+					header = json.getString(key); break;
+				default:
+					valid = false;
+			}
+			if (valid) dirtyFields.add(key);
+		}
+		return this;
+	}
 }