diff --git a/productMods/edit/forms/addAuthorsToInformationResource.jsp b/productMods/edit/forms/addAuthorsToInformationResource.jsp
index 3ac90486..b633a7b4 100644
--- a/productMods/edit/forms/addAuthorsToInformationResource.jsp
+++ b/productMods/edit/forms/addAuthorsToInformationResource.jsp
@@ -238,7 +238,7 @@ SPARQL queries for existing values. --%>
         EditConfiguration.putConfigInSession(editConfig,session);
     }
     
-    //editConfig.addValidator(new PublicationHasAuthorValidator());
+    editConfig.addValidator(new PublicationHasAuthorValidator());
     
     Model model = (Model) application.getAttribute("jenaOntModel");
     String objectUri = (String) request.getAttribute("objectUri");
@@ -288,11 +288,14 @@ SPARQL queries for existing values. --%>
             if ( author != null ) {
                 request.setAttribute("author", author);
                 %> 
-                <%-- RY Should use author short view here instead? --%>
                 <c:url var="authorHref" value="/individual">
                     <c:param name="uri" value="${author.URI}"/>
-                </c:url> 
-                <li><a href="${authorHref}" class="authorName">${author.name}</a><a href="" class="remove">Remove</a></li> 
+                </c:url>                
+                <li>
+                    <span class="existingAuthorUri">${author.URI}</span>
+                    <a href="${authorHref}" class="existingAuthor">${author.name}</a>
+                    <a href="" class="remove">Remove</a>
+                </li> 
                 
                 <% 
             }
@@ -340,28 +343,3 @@ SPARQL queries for existing values. --%>
 
 <jsp:include page="${postForm}"/>
 
-<%!
-// We'll just rely on rdfs:label for now. In future, the label will be created by the app from
-// last name, first name, and middle name fields, so we don't have to worry about inconsistent
-// ordering.
-/*
-public String getAuthorName(Individual author) {
-    String name;
-    
-    String lastName = author.getDataValue("http://xmlns.com/foaf/0.1/lastName");
-    String firstName = author.getDataValue("http://xmlns.com/foaf/0.1/firstName");
-
-    if (lastName != null && firstName != null) {
-        name = lastName + ", " + firstName; 
-        String middleName = author.getDataValue("http://vivoweb.org/ontology/core#middleName");
-        if (middleName != null) {
-            name += " " + middleName;
-        }
-    }
-    else {
-        name = author.getName();
-    }
-    return name;
-}
-*/
-%>
diff --git a/productMods/edit/forms/css/addAuthorsToInformationResource.css b/productMods/edit/forms/css/addAuthorsToInformationResource.css
index 1f123519..1c5d20ac 100644
--- a/productMods/edit/forms/css/addAuthorsToInformationResource.css
+++ b/productMods/edit/forms/css/addAuthorsToInformationResource.css
@@ -9,11 +9,16 @@
     margin-bottom: .75em;
 }
 
-#authors a.authorName {
+#authors a.existingAuthor {
     display: inline-block;
     width: 15em;
 }
 
+/* These are only here for JavaScript to pick up. Don't display!! */
+#authors span.existingAuthorUri {
+    display: none;
+}
+
 /* Hide elements not used in non-JS version of form */
 #showAddForm,
 a.remove,
diff --git a/productMods/edit/forms/js/addAuthorsToInformationResource.js b/productMods/edit/forms/js/addAuthorsToInformationResource.js
index 494c69ae..c33fcf71 100644
--- a/productMods/edit/forms/js/addAuthorsToInformationResource.js
+++ b/productMods/edit/forms/js/addAuthorsToInformationResource.js
@@ -134,25 +134,38 @@ var addAuthorForm = {
 
     	var cache = {};
     	var url = $('#acUrl').val();
+    	var existingAuthorUris = addAuthorForm.getExistingAuthorUris();  
+    	console.log(existingAuthorUris);
+    	jQuery.each(existingAuthorUris, function(index, element) {
+    		url += '&filter=' + element;
+    	});
     	$('#lastName').autocomplete({
     		minLength: 2,
-    		source: function(request, response) {
-    			if (request.term in cache) {
-    				response(cache[request.term]);
-    				return;
-    			}
-    			
-    			$.ajax({
-    				url: url,
-    				dataType: 'json',
-    				data: request,
-    				success: function(data) {
-    					cache[request.term] = data;
-    					response(data);
-    				}
-
-    			});
-    		},
+    		source: url,
+// RY For now, not using cache because there are complex interactions between filtering and caching.
+// We want to filter out existingAuthors from autocomplete results, and this seems easiest to do
+// server-side. But if an author gets removed, we need to put them back in the results. If results
+// are cached, the cache needs to be cleared on a remove. Not sure if we have access to it there.
+// Lots of complexity involved, so for now let's try without the cache.
+//    		source: function(request, response) {
+//    			if (request.term in cache) {
+//    				//console.log("found term in cache");
+//    				response(cache[request.term]);
+//    				return;
+//    			}
+//    			
+//    			$.ajax({
+//    				url: url,
+//    				dataType: 'json',
+//    				data: request,
+//    				success: function(data) {
+//    					cache[request.term] = data;
+//    					//console.log("not getting term from cache");
+//    					response(data);
+//    				}
+//
+//    			});
+//    		},
 		    select: function(event, ui) {
     			addAuthorForm.showSelectedAuthor(ui);		
 			}
@@ -160,6 +173,14 @@ var addAuthorForm = {
 
     },
     
+    getExistingAuthorUris: function() {
+    	var authorUris = $('span.existingAuthorUri'); 
+    	return authorUris.map(function() {
+    		return $(this).html();
+    	});
+    	
+    },
+    
     prepareFieldValuesForSubmit: function() {
     	var firstName,
     	    middleName,