diff --git a/validators.php b/validators.php
new file mode 100644
index 0000000..4bcbe42
--- /dev/null
+++ b/validators.php
@@ -0,0 +1,140 @@
+<?php
+include_once'ldap.php';
+include_once'redis.php';
+include_once'config.php';
+include_once'utils.php';
+
+$INCLUDE_STRINGS_PATH = "templates_".$LANG_CC;
+if (isset($LANG_CC) && !empty($LANG_CC)) $TEMPLATE = $INCLUDE_STRINGS_PATH;
+else $TEMPLATE = "templates";
+
+
+function validate_username(string $username)
+{
+        include_once'config.php';
+        include_once$TEMPLATE.'/strings.php';
+        $error = "";
+        if (ldap_user_count($username)) {
+                $error = $error . $USERNAME_VALIDATION_ERROR->registered;
+                unset($_POST["username"]);
+        }
+        if (preg_match("/\s/", $username)) {
+                $error = $error . $USERNAME_VALIDATION_ERROR->no_whitespaces;
+                unset($_POST["username"]);
+        }
+        if (strlen($username) > $VAL_USER->max_username) {
+                $error = $error . format($USERNAME_VALIDATION_ERROR->smaller_than, ["num" => $VAL_USER->max_username + 1]);
+                unset($_POST["username"]);
+        }
+        if (strlen($username) < $VAL_USER->min_username) {
+                $error = $error . format($USERNAME_VALIDATION_ERROR->bigger_than, ["num" => $VAL_USER->min_username - 1]);
+                unset($_POST["username"]);
+        }
+        if (preg_match('/[\'\/~`\!@#\$%\^&\*\(\)_\-\+=\{\}\[\]\|;:"\<\>,\.\?\\\]/', $username)) {
+                $error = $error . $USERNAME_VALIDATION_ERROR->no_special_chars;
+                unset($_POST["username"]);
+        }
+        if (preg_match('/^\d/', $username)) {
+                $error = $error . $USERNAME_VALIDATION_ERROR->no_number_begining;
+                unset($_POST["username"]);
+        }
+        include_once"blacklists/usernames.php";
+        if (in_array($username, $USERNAME_BLACKLIST)) {
+                $error = $error . $USERNAME_VALIDATION_ERROR->blacklisted; 
+                unset($_POST["username"]);
+        }
+        return $error;
+}
+
+function validate_name(string $name, object $ERRORS)
+{
+        include_once "config.php";
+        include_once$TEMPLATE.'/strings.php';
+        $error = "";
+        if (preg_match("/\s/", $name)) {
+                $error = $error . $ERRORS->no_whitespaces;
+                unset($_POST["name"]);
+        }
+        if (strlen($name) > $VAL_USER->max_first_name) {
+                $error = $error . format($ERRORS->smaller_than, ["num" => $VAL_USER->max_first_name + 1]);
+                unset($_POST["name"]);
+        }
+        if (strlen($name) < $VAL_USER->min_first_name) {
+                $error = $error . format($ERRORS->bigger_than, ["num" => $VAL_USER->min_first_name - 1]);
+                unset($_POST["name"]);
+        }
+        if (preg_match('/[\'\/~`\!@#\$%\^&\*\(\)_\-\+=\{\}\[\]\|;:"\<\>,\.\?\\\0-9]/', $name)) {
+                $error = $error . $ERRORS->no_special_chars;
+                unset($_POST["name"]);
+        }
+        return $error;
+}
+
+function validate_email(string $email)
+{
+        include_once "config.php";
+        include_once$TEMPLATE.'/strings.php';
+        $error = "";
+
+        if (ldap_mail_count($email)) {
+                $error = $error . format($EMAIL_VALIDATION_ERROR->registered, ["link" => $BASE_URL."?type=recover"]);
+                unset($_POST["email"]);
+        }
+        if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
+                $error = $error . $EMAIL_VALIDATION_ERROR->invalid;
+                unset($_POST["email"]);
+        } elseif (in_array(explode("@", $email)[1], $MAIL_HOST_BLACKLIST)) {
+                $error = $error . $EMAIL_VALIDATION_ERROR->blacklisted;
+                unset($_POST["email"]);
+        }
+        $pending = redis_get("pending");
+        if ($pending) {
+                $maillist = $pending->mails;
+                if (in_array($email, $maillist)) {
+                        $error = $error . $EMAIL_VALIDATION_ERROR->pending;
+                        unset($_POST["email"]);
+                }
+        }
+        return $error;
+}
+
+
+function validate_password(string $password)
+{
+        include_once "config.php";
+        include_once$TEMPLATE.'/strings.php';
+        $error = "";
+        if ($_POST["password"] != $_POST["password_confirm"]) {;
+                $error = $error . $PASSWORD_VALIDATION_ERROR->no_match;
+                unset($_POST["password_confirm"]);
+        }
+        if (strlen($password) < $VAL_USER->min_password) {
+                $error = $error . format($PASSWORD_VALIDATION_ERROR->bigger_than, ["num" => $VAL_USER->min_password]);
+                unset($_POST["password"]);
+                unset($_POST["password_confirm"]);
+        }
+        if (strlen($password) > $VAL_USER->max_password) {
+                $error = $error . format($PASSWORD_VALIDATION_ERROR->smaller_than, ["num" => $VAL_USER->max_password]);
+                unset($_POST["password"]);
+                unset($_POST["password_confirm"]);
+        }
+        include_once"blacklists/password.php";
+        if (in_array($password, $PASSWORD_BLACKLIST)) {
+                $error = $error . $PASSWORD_VALIDATION_ERROR->blacklisted;
+                unset($_POST["password"]);
+                unset($_POST["password_confirm"]);
+        }
+        foreach (array("username", "name", "last_name", "email") as &$field) {
+                if (!isset($_POST[$field]))
+                        continue;
+                $value = strtoupper($_POST[$field]);
+                $PASSWORD = strtoupper($password);
+                if (strpos($value, $PASSWORD) !== false || strpos($PASSWORD, $value) !== false) {
+                        $error = $error . $PASSWORD_VALIDATION_ERROR->shared_inclusion;
+                        unset($_POST["password"]);
+                        unset($_POST["password_confirm"]);
+                        break;
+                }
+        }
+        return $error;
+}