Which of the following is a condition under which targeted direct mail is allowed?

Targeted direct mail is a marketing method that allows attorneys to reach potential clients, but it is subject to strict regulations to ensure ethical compliance. The condition that targeted direct mail must meet labeling guidelines as "Advertising Material" is crucial because it ensures transparency and allows recipients to understand the nature of the communication.

By labeling correspondence as "Advertising Material," attorneys comply with rules intended to protect consumers from misleading representations, ensuring that individuals can recognize when they are being solicited by a professional for legal services. This labeling requirement fosters honesty in communication and maintains the integrity of the legal profession.

The other conditions listed do not align with the established guidelines for ethical advertising. While sending mail to past clients or offering a free consultation may sound permissible, they must still adhere to the overarching rules governing attorney advertising and solicitation. Sending mail anonymously violates the principle of transparency that the labeling requirement aims to uphold.