To do so, send a letter to the debt collector asking for an explanation in writing. The letter must inform you that you have 30 days to dispute the debt, and if you do, the collector is obligated to provide proof of the debt.Schedule a free initial consultation today. Our debt harassment lawyers in Chula Vista, San Diego, CA will provide the debt collection help you need to gain some clarity about your finances. If you owe money to a California court and don't pay, it becomes courtordered debt. Courts may send us your debt for collection. At the Law Office of David J. Hollander, we have over 24 years of experience handling collection matters and know how to take the necessary steps to collect. Contingencies Do Not work. No fee unless we collect. What to include in the San Diego demand letter?