diff --git a/YACOSWeb/WebContent/WEB-INF/classes/messages.properties b/YACOSWeb/WebContent/WEB-INF/classes/messages.properties
index 8e13ab1..3ee2f95 100644
--- a/YACOSWeb/WebContent/WEB-INF/classes/messages.properties
+++ b/YACOSWeb/WebContent/WEB-INF/classes/messages.properties
@@ -112,3 +112,10 @@ evaluation.commentAuthor=Comment of author
 evaluation.headPage=Here is a report of the evaluation
 evaluation.titleArticle=The title of article is  
 evaluation.note=The note for the criterion
+
+#Validation messages for errors
+submissionArticle.title=The title should not be null
+submissionArticle.theme=The theme should not be null
+submissionArticle.abstractText=The Abstract text should not be null
+submissionArticle.mainauthor=the main author should not be null, insert example "toto"
+submissionArticle.file=please choose an article to submit
\ No newline at end of file