diff --git a/History.md b/History.md
index 865d410b..7b7227ca 100644
--- a/History.md
+++ b/History.md
@@ -26,6 +26,8 @@ switch
 - change from ZUGFeRDExporter to IZUGFeRDExporter
 - javadoc export
 - have visualizer
+- validate as library doc
+- unify loggers
 
 
 ### 2.0 still todo
@@ -33,14 +35,11 @@ switch
 - verapdf as prevalidation?
 - visualization? zugferdvisualizer?
 - new sample invoice
-- validate as library doc
 - prompt for source file for validation has to be pdf
 - be able to disable "source pdf set to timeout"
 - automated tests zuv/verapdf validate created library test files
-- unify loggers
 - *visualizer to work with Extended profile
 - *visualizer tests
-- *validator not to log to stdout
 - *validator not to XR error on ZF files (only notices)
 - *from A3 does not seem tow ork see mustangreaderwriteredgetest:testedgeexport
 - xmp errors may not show correctly in log
@@ -50,7 +49,6 @@ switch
 - confirm correct generation from pdf/a3 files zf2edgetest
 - *correctiontest exports zf1+zf2?
 - *use validator in tests of library
-- *invoiceprovider currencyid missing
 - *USt 0% wird aus invoice-klasse noch nicht sauber abgefangen
 - *ownContact sollte in einen Contact schreiben
 
diff --git a/Mustang-CLI/src/main/resources/logback.xml b/Mustang-CLI/src/main/resources/logback.xml
index 5bfbb0db..3c190b02 100644
--- a/Mustang-CLI/src/main/resources/logback.xml
+++ b/Mustang-CLI/src/main/resources/logback.xml
@@ -1,6 +1,7 @@
 <configuration>                                                                                                                                                                                                                               
                                                                                                                                                                                                                                               
-  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">                                                                                                                                                                        
+  <appender name="STDERR" class="ch.qos.logback.core.ConsoleAppender">
+    <target>System.err</target>
     <encoder>                                                                                                                                                                                                                                 
       <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>                                                                                                                                                             
     </encoder>                                                                                                                                                                                                                                
@@ -24,6 +25,6 @@
   <!-- Configure so that it outputs to both console and log file -->                                                                                                                                                                          
   <root level="INFO">                                                                                                                                                                                                                        
     <appender-ref ref="FILE" />                                                                                                                                                                                                               
-    <appender-ref ref="STDOUT" />
+    <appender-ref ref="STDERR" />
   </root>                                                                                                                                                                                                                                     
 </configuration>   
diff --git a/library/src/main/resources/logback.xml b/library/src/main/resources/logback.xml
new file mode 100644
index 00000000..3c190b02
--- /dev/null
+++ b/library/src/main/resources/logback.xml
@@ -0,0 +1,30 @@
+<configuration>                                                                                                                                                                                                                               
+                                                                                                                                                                                                                                              
+  <appender name="STDERR" class="ch.qos.logback.core.ConsoleAppender">
+    <target>System.err</target>
+    <encoder>                                                                                                                                                                                                                                 
+      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>                                                                                                                                                             
+    </encoder>                                                                                                                                                                                                                                
+  </appender>                                                                                                                                                                                                                                 
+                                                                                                                                                                                                                                              
+                                                                                                                                                                                                                                              
+  <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">                                                                                                                                                              
+    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">                                                                                                                                                                
+      <!-- Daily rollover -->                                                                                                                                                                                                                 
+      <fileNamePattern>log/ZUV-%d{yyyy-MM}.log</fileNamePattern>                                                                                                                                                                     
+                                                                                                                                                                                                                                              
+      <!-- Keep 5 years worth of history -->                                                                                                                                                                                                  
+      <maxHistory>60</maxHistory>                                                                                                                                                                                                              
+    </rollingPolicy>                                                                                                                                                                                                                          
+                                                                                                                                                                                                                                              
+    <encoder>                                                                                                                                                                                                                                 
+      <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>                                                                                                                                                             
+    </encoder>                                                                                                                                                                                                                                
+  </appender>                                                                                                                                                                                                                                 
+                                                                                                                                                                                                                                              
+  <!-- Configure so that it outputs to both console and log file -->                                                                                                                                                                          
+  <root level="INFO">                                                                                                                                                                                                                        
+    <appender-ref ref="FILE" />                                                                                                                                                                                                               
+    <appender-ref ref="STDERR" />
+  </root>                                                                                                                                                                                                                                     
+</configuration>   
diff --git a/validator/src/main/resources/logback.xml b/validator/src/main/resources/logback.xml
index 5c52d73c..aed3e946 100644
--- a/validator/src/main/resources/logback.xml
+++ b/validator/src/main/resources/logback.xml
@@ -1,8 +1,9 @@
 <configuration>                                                                                                                                                                                                                               
                                                                                                                                                                                                                                               
-  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">                                                                                                                                                                        
+  <appender name="STDERR" class="ch.qos.logback.core.ConsoleAppender">
+    <target>System.err</target>
     <encoder>                                                                                                                                                                                                                                 
-      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>                                                                                                                                                             
+      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
     </encoder>                                                                                                                                                                                                                                
   </appender>                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                               
@@ -24,6 +25,6 @@
   <!-- Configure so that it outputs to both console and log file -->                                                                                                                                                                          
   <root level="INFO">                                                                                                                                                                                                                        
     <appender-ref ref="FILE" />                                                                                                                                                                                                               
-    <!--  appender-ref ref="STDOUT" /-->                                                                                                                                                                                                             
+    <!--  appender-ref ref="STDERR" /-->
   </root>                                                                                                                                                                                                                                     
-</configuration>   
\ No newline at end of file
+</configuration>