diff --git a/server/zanata-war/src/main/java/org/zanata/rest/service/ResourceUtils.java b/server/zanata-war/src/main/java/org/zanata/rest/service/ResourceUtils.java
index 11e530a1aa..0ab4cb1b48 100644
--- a/server/zanata-war/src/main/java/org/zanata/rest/service/ResourceUtils.java
+++ b/server/zanata-war/src/main/java/org/zanata/rest/service/ResourceUtils.java
@@ -74,15 +74,15 @@ public class ResourceUtils
    /**
     * Newline character used for multi-line comments
     */
-   private static final char NEWLINE = '\n';
+   private static final char     NEWLINE = '\n';
 
-   private static final String ZANATA_GENERATOR_PREFIX = "Zanata";
+   private static final String   ZANATA_GENERATOR_PREFIX = "Zanata";
    
-   private static final String ZANATA_TAG = "#zanata";
+   private static final String   ZANATA_TAG = "#zanata";
    
-   private static final String PO_DATE_FORMAT = "yyyy-MM-dd hh:mmZ";
+   private static final String   PO_DATE_FORMAT = "yyyy-MM-dd hh:mmZ";
    
-   private static final String PO_VALID_CONTENT_TYPE = "charset=UTF-8";
+   private static final String[] PO_VALID_CONTENT_TYPES = {"charset=UTF-8", "charset=utf-8", "charset=ASCII"};
 
    
    /**
@@ -1171,7 +1171,13 @@ public boolean validateResourceEncoding(Resource res)
          {
             if( entry.getKey().equalsIgnoreCase( CONTENT_TYPE_HDR ) )
             {
-               return entry.getValue().contains( PO_VALID_CONTENT_TYPE );
+               for( String acceptedContentType : PO_VALID_CONTENT_TYPES )
+               {
+                  if( entry.getValue().contains( acceptedContentType ) )
+                  {
+                     return true;
+                  }
+               }
             }
          }
          
diff --git a/server/zanata-war/src/main/java/org/zanata/rest/service/TranslationResourcesService.java b/server/zanata-war/src/main/java/org/zanata/rest/service/TranslationResourcesService.java
index ba39c8b014..d3fd64f0f7 100644
--- a/server/zanata-war/src/main/java/org/zanata/rest/service/TranslationResourcesService.java
+++ b/server/zanata-war/src/main/java/org/zanata/rest/service/TranslationResourcesService.java
@@ -415,7 +415,7 @@ public Response putResource(@PathParam("id") String idNoSlash, InputStream messa
 
       Resource entity = RestUtils.unmarshall(Resource.class, messageBody, requestContentType, headers.getRequestHeaders());
       log.debug("resource details: {0}", entity);
-      validateResourceEncoding(entity);
+      boolean validResourceEnc = this.resourceUtils.validateResourceEncoding(entity);
       
       HDocument document = documentDAO.getByDocId(hProjectIteration, id);
       HLocale hLocale = validateSourceLocale(entity.getLang());
@@ -476,6 +476,11 @@ else if (document.isObsolete())
       {
          copyClosestEquivalentTranslation(document.getId(), entity.getName(), projectSlug, iterationSlug);
       }
+      
+      if( !validResourceEnc )
+      {
+         response.entity("warning: potentially incompatible character encoding.");
+      }
             
       log.debug("put resource successfully");
       return response.tag(etag).build();
@@ -914,14 +919,6 @@ private void validateExtensions(String... validExt) throws WebApplicationExcepti
       }
    }
    
-   private void validateResourceEncoding(Resource res) throws WebApplicationException
-   {
-      if( !this.resourceUtils.validateResourceEncoding(res) )
-      {
-         throw new WebApplicationException(Response.status(Status.UNSUPPORTED_MEDIA_TYPE).entity("Unsupported Encoding: ").build());
-      }
-   }
-   
 
    public void copyClosestEquivalentTranslation(Long docId, String name, String projectSlug, String iterationSlug)
    {
diff --git a/server/zanata-war/src/test/java/org/zanata/rest/service/ResourceTestUtil.java b/server/zanata-war/src/test/java/org/zanata/rest/service/ResourceTestUtil.java
index a4600bf9b0..034b5ae7ab 100644
--- a/server/zanata-war/src/test/java/org/zanata/rest/service/ResourceTestUtil.java
+++ b/server/zanata-war/src/test/java/org/zanata/rest/service/ResourceTestUtil.java
@@ -3,6 +3,8 @@
 import java.util.Iterator;
 import java.util.List;
 
+import org.zanata.rest.dto.extensions.gettext.HeaderEntry;
+import org.zanata.rest.dto.extensions.gettext.PoHeader;
 import org.zanata.rest.dto.extensions.gettext.PoTargetHeader;
 import org.zanata.rest.dto.extensions.gettext.TranslationsResourceExtension;
 import org.zanata.rest.dto.resource.AbstractResourceMeta;
@@ -56,5 +58,18 @@ static void clearPoTargetHeaders(TranslationsResource ... docs)
          }
       }
    }
+   
+   static void addPoHeader( Resource res, String key, String value )
+   {
+      PoHeader poHeader = res.getExtensions(true).findByType(PoHeader.class);
+      
+      if( poHeader == null )
+      {
+         poHeader = new PoHeader();
+         res.getExtensions().add(poHeader);
+      }
+      
+      poHeader.getEntries().add( new HeaderEntry(key, value) );
+   }
 
 }
diff --git a/server/zanata-war/src/test/java/org/zanata/rest/service/TranslationResourceRestTest.java b/server/zanata-war/src/test/java/org/zanata/rest/service/TranslationResourceRestTest.java
index 6d59715bcd..2870207d25 100644
--- a/server/zanata-war/src/test/java/org/zanata/rest/service/TranslationResourceRestTest.java
+++ b/server/zanata-war/src/test/java/org/zanata/rest/service/TranslationResourceRestTest.java
@@ -715,8 +715,22 @@ public void getBadProject() throws Exception
       ClientResponse<List<ResourceMeta>> response = badTransResource.get(null);
       assertThat(response.getStatus(), is(404));
    }
+   
+   @Test
+   public void putUnexpectedEncodingDocument() throws Exception
+   {
+      Resource doc = this.createSourceDoc("DocumentWithUnexpectedEncoding", true);
+      ResourceTestUtil.addPoHeader(doc, "Content-Type", "application/x-publican; charset=UNACCEPTABLE");
+      ClientResponse<String> response = this.putResource(doc, "gettext");
+      assertThat(response.getEntity(), containsString("warning"));
+   }
 
    // END of tests
+   
+   private ClientResponse<String> putResource( Resource res, String extensions )
+   {
+      return transResource.putResource(res.getName(), res, new StringSet( extensions ));
+   }
 
    private void expectDocs(boolean checkRevs, boolean checkLinksIgnored, Resource... docs)
    {