A DM that’s gone quiet for more than 24 hours doesn’t mean the conversation is closed for good. Meta runs a message tag called Human Agent that opens a separate 7-day window for a reply — but it only works under one condition teams often miss: an actual person has to send it, not a bot or an automated reply. Here’s what Meta’s own policy says, and how to set up 1CS so a human reply actually qualifies.
When Instagram’s Reply Window Actually Closes
Meta calls this the standard messaging window, and the same rule runs across Messenger and the IG Messaging API. Normally a business has 24 hours from the customer’s last message to reply, and that reply can carry promotional content. The one exception: if the customer’s first message followed a Click-to-Messenger or Click-to-Direct ad, the window can run up to 7 days from that message. Past the window, an ordinary reply simply won’t send. (Source: Meta for Developers — Messenger Platform policy overview)
The Human Agent Tag Most Teams Never Use
Beyond the standard window, Meta maintains a set of message tags that let a business message outside it for specific situations. One is the Human Agent tag, which Meta’s own documentation describes as letting businesses “manually respond to user messages within a separate 7-day period,” available on both the Messenger Platform and the IG Messaging API (same source as above). The word to hold onto is “manually” — it has to be a real person typing the reply, not an automated or AI-generated message, and it shouldn’t carry promotional content either.
ตั้งค่าใน 1CS — make sure it’s a human, not AI, replying
The condition Meta checks for the Human Agent tag — a real person, not automation — is exactly what 1CS’s Human Handoff setting controls. Open AI > AI Agent, go to the “ส่งต่อทีม” tab (labelled “Escalation & handoff”), and under “การส่งต่อให้มนุษย์” (handoff to a human) choose the “ถอยออก” mode (“step back”). This stops the AI from replying the moment a team member has answered the customer, and hands that conversation to the agent who replied. Keep the grace period short — the default is 15 seconds — so the AI always waits for a human first. The system also counts it as handled if your team replies straight from the Instagram app, outside 1CS. See the full Human Handoff setup; the page is in Thai. The feature itself is part of 1CS’s AI Agents.
A Checklist to Copy Before You Reply Late
Before an agent types a reply to a DM that’s crossed 24 hours, run it through this:
- Confirm the customer’s last message is still within 7 days — past that, the Human Agent tag no longer applies, and you’ll need to wait for the customer to message first.
- Confirm a real agent is sending this reply, not an automated or AI-drafted one.
- Strip out any promotion, discount or product link from the reply.
- If more than 7 days have passed, send a short nudge instead, such as: “Hi [customer name], could you send us a quick message so we can follow up on [the topic you left off at]?” — that lets the customer reopen the window themselves.
The Catch Worth Knowing Before You Rely on It
As a recommended default, check DMs nearing the 24-hour mark every day, and assign one agent to answer them directly rather than leaving it to whatever auto-reply fires on schedule — that’s our own working practice, not a published study. The mechanism itself differs from WhatsApp, where reopening a closed conversation needs a pre-approved message template; Instagram’s Human Agent tag needs no template at all, just a person replying within 7 days with no promotional content attached. The failure mode we see most often: an agent replies straight from the Instagram app on their phone without 1CS open, so the system never registers that a human already answered — and the AI can still fire a reply on the next turn if Human Handoff wasn’t already set to “ถอยออก” beforehand. Set that mode ahead of time, not while a DM is already running out its 7 days. If you’re also deciding when a case should go to a person in the first place rather than after the window closes, see how to design an AI agent that knows when to hand off.
