diff --git a/1.sources/MyHealth/src/managedbean/validators/EmailValidator.java b/1.sources/MyHealth/src/managedbean/validators/EmailValidator.java
index b866476..86b2a9e 100644
--- a/1.sources/MyHealth/src/managedbean/validators/EmailValidator.java
+++ b/1.sources/MyHealth/src/managedbean/validators/EmailValidator.java
@@ -4,6 +4,7 @@ import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import javax.el.ValueExpression;
 import javax.faces.application.FacesMessage;
 import javax.faces.component.UIComponent;
 import javax.faces.context.FacesContext;
@@ -13,6 +14,8 @@ import javax.faces.validator.ValidatorException;
 
 import org.primefaces.validate.ClientValidator;
 
+import managedbean.systemAdmin.AddAdminMBean;
+
 @FacesValidator("emailValidator")
 public class EmailValidator implements Validator<String>, ClientValidator {
 
@@ -21,16 +24,32 @@ public class EmailValidator implements Validator<String>, ClientValidator {
 
 	public void validate(FacesContext context, UIComponent comp, String value) throws ValidatorException {
 		String strValue = "";
-		
+
 		if (value != null)
-			strValue = String.valueOf(value);
-		
+			strValue = String.valueOf(value).toLowerCase();
+
 		if (strValue.equals(""))
 			throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, "Correo electrónico no válido", "La dirección " + value + " no es una dirección válida"));
 
 		Matcher matcher = EMAIL_COMPILED_PATTERN.matcher((String) value);
 		if (!matcher.matches())
 			throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, "Correo electrónico no válido", "La dirección " + value + " no es una dirección válida"));
+
+		boolean emailIsDupe = false;
+		ValueExpression valueExpr = comp.getValueExpression("managedBean");
+
+		if (valueExpr != null) {
+			Object managedBean = comp.getValueExpression("managedBean").getValue(context.getELContext());
+
+			if (managedBean instanceof AddAdminMBean) {
+				AddAdminMBean admBean = AddAdminMBean.class.cast(managedBean);
+				emailIsDupe = admBean.emailAlreadyRegistered(strValue);
+			}
+		}
+		
+		if (emailIsDupe == true)
+			throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_WARN, "Correo electrónico ya registrado",
+					"La dirección de correo electrónico " + strValue + " ya ha sido registrada en el sistema"));
 	}
 
 	public Map<String, Object> getMetadata() {
diff --git a/1.sources/MyHealth/src/managedbean/validators/NifValidator.java b/1.sources/MyHealth/src/managedbean/validators/NifValidator.java
index 25bd686..4b14373 100644
--- a/1.sources/MyHealth/src/managedbean/validators/NifValidator.java
+++ b/1.sources/MyHealth/src/managedbean/validators/NifValidator.java
@@ -2,6 +2,7 @@ package managedbean.validators;
 
 import java.util.Map;
 
+import javax.el.ValueExpression;
 import javax.faces.application.FacesMessage;
 import javax.faces.component.UIComponent;
 import javax.faces.context.FacesContext;
@@ -32,16 +33,20 @@ public class NifValidator implements Validator<String>, ClientValidator {
 
 		if (ValidationUtils.isValid(strValue) == false)
 			throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, "El NIF no es válido", "El NIF " + strValue + " no es válido"));
-		
-		Object managedBean = comp.getValueExpression("managedBean").getValue(context.getELContext());
-		boolean nifIsDupe = false;
 
-		if (managedBean instanceof RegisterUserMBean) {
-			RegisterUserMBean ruBean = RegisterUserMBean.class.cast(managedBean);
-			nifIsDupe = ruBean.checkNIFDuplicated(strValue, ruBean.getUserType());
-		} else if (managedBean instanceof UpdateProfileMBean) {
-			UpdateProfileMBean upBean = UpdateProfileMBean.class.cast(managedBean);
-			nifIsDupe = upBean.checkNIFDuplicated(strValue, upBean.getUserType(), upBean.getId());
+		boolean nifIsDupe = false;
+		ValueExpression valueExpr = comp.getValueExpression("managedBean");
+
+		if (valueExpr != null) {
+			Object managedBean = valueExpr.getValue(context.getELContext());
+
+			if (managedBean instanceof RegisterUserMBean) {
+				RegisterUserMBean ruBean = RegisterUserMBean.class.cast(managedBean);
+				nifIsDupe = ruBean.checkNIFDuplicated(strValue, ruBean.getUserType());
+			} else if (managedBean instanceof UpdateProfileMBean) {
+				UpdateProfileMBean upBean = UpdateProfileMBean.class.cast(managedBean);
+				nifIsDupe = upBean.checkNIFDuplicated(strValue, upBean.getUserType(), upBean.getId());
+			}
 		}
 
 		PrimeFaces.current().ajax().addCallbackParam("formattedNIF", strValue);