It will be great to insert a condition if the field is required during posting an ad, then asterisks will be (true) after the world of required field.
Location * , Name * ...etc

@Ivanko
Thanks for suggestion, we will try to implement it in next release.

may be in this way, example for Phone in item-post.php

instead of :
<label for="phone"><?php _e('Mobile Phone', 'veronika'); ?></label>
use:
<label for="phone"><?php _e('Mobile Phone', 'veronika'); ?>
            <?php if(strpos($required_fields, 'phone') !== false) { ?>
            <span class="req">*</span>
            <?php } ?>
            </label>
$required_fields has to be declared early and inserted above the form.
<?php $required_fields = strtolower(osc_get_preference('post_required', 'veronika_theme')); ?>