Pay for Work Completed

[Kitsune]

Let's say you do little HTML update jobs here and there for so much money an hour for a period of six months based on an agreement. On submitting an invoice, the client drags their feet, questions it for weeks, and, in general, never really coughs up a check to pay for the work you've done.

Now lets say you have a backup of the initial website before you made any changes.

Do you ever return the site to what it was if payment is never received? At what point do you do that? 30, 60, 90 days after the invoice is submitted? What are the rammifications of this action?