As part of a cost-saving measure, tax payments are sent directly to a “lockbox” center of the county’s depository bank. Several times a day, including weekends, payments are received at the San Francisco mailing address preprinted on the coupon and delivered to the center for processing. There, checks are immediately scanned and deposited directly into the bank account. It is imperative to have sufficient funds in your personal bank account before mailing your tax payment. Our office does not redeposit checks for insufficient funds.