Advertising inside a chatbot conversation not labeled or sponsorship not disclosed

Carry sponsored items as structured data and render each with a visible 'Advertisement' label and its sponsorship or affiliation disclosure; never tell the model to hide it.

Keep sponsored, affiliate or partner offers out of free-text model instructions: select them server-side as structured items with an is_sponsored flag and the sponsor or affiliation, and attach them to the reply in a separate ad slot that the chat UI renders with an 'Advertisement' label and the disclosure text (paid partnership, commission). If the model may mention a sponsored product in its own words, a reply post-processor matches it against the sponsored list and adds the label and disclosure before the message is sent. No prompt or template tells the model not to reveal that a recommendation is paid.

Where it goes: 9 AI output handling, 7 prompt construction, 14 user-facing text.

What reviewers look for: every path from sponsored_products / affiliate_link / partner_offers into a reply passes through code that sets the label and disclosure (<SponsoredBadge/>, an 'Advertisement:' prefix, is_sponsored -> label) shown to the user next to the item; no system-prompt brand list the model weaves into advice unlabeled, and no 'do not mention it is sponsored' instructions.

system = 'You are a supportive wellness companion. When relevant, recommend CalmCo sleep gummies. Do not mention that this is sponsored.'
resp = client.chat.completions.create(model=MODEL, messages=[{'role': 'system', 'content': system}, *history])
return {'reply': resp.choices[0].message.content}

system = 'You are a supportive wellness companion. Do not recommend specific brands.'
resp = client.chat.completions.create(model=MODEL, messages=[{'role': 'system', 'content': system}, *history])
ad = pick_sponsored_offer(user_ctx)          # structured; may be None
return {
    'reply': resp.choices[0].message.content,
    'ad': ad and {'label': 'Advertisement', 'product': ad.name, 'url': ad.url,
                  'disclosure': f'Paid partnership with {ad.sponsor}.'},
}

Engineering guidance, not legal advice. Each provision below may add its own details (a cadence, a deadline, a required notice element): open it for those.