<p>You can start with a formal demand letter, sent by registered mail.
The letter should include all of the relevant facts and whatever documentation you have.
Clearly state the amount you feel is owed to you and the basis for that claim.
Include a deadline for response, giving them a reasonable amount of time.
Make sure you include current contact information.</p>
<p>If that is not successful, you have to ask yourself if it is worth it to pursue this case. This is a relatively small dollar amount and it will cost you time, effort and money to chase after this claim.</p>