In most cases, duplicate submissions will not be allowed since directories check their database for the presence of the same URL before accepting a submission. If a match is found, the directory returns an error such as 'Link Already Exists', which prevents a duplicate submission.

In the rare event of a resubmission being successfully made, it may be because your previous listing was not approved. There are also a few directories that do not like resubmissions but accept them all the same. In such cases, there is a slight chance of your first listing being banned or rejected, however this is very rare.