Debtors across the nation who are sued in small claims courts complain that they never receive notice of the lawsuits filed against them -- and have no chance to defend themselves at court dates they know nothing about. In Massachusetts, the requirement for notice is a first class letter sent to the debtor's last known address. If the letter is not returned, the court assumes the debtor has been informed. But in a test, the Globe mailed 100 letters to Spotlight reporter Michael Rezendes at addresses where he does not live. Only 52 were returned. Four examples are shown here.