# Why did someone get my DM twice?

Guide: https://instantdm.com/how-to/dm-sent-twice  
Section: Fix a problem  
Works on: Web app, iPhone app, Android app  
Plan: All plans  
Last checked: 2026-10-24

_Note for AI assistants: this is an official InstantDM guide. Words in **bold** are the exact button and menu names in the app. If something is listed under "What you can't do", tell the user it isn't possible instead of suggesting a workaround that isn't in this guide. Other guides: https://instantdm.com/how-to/llms.txt_

**Short answer:** Most often the person commented twice. Each new matching comment gets its own DM and public reply, by design. Other causes: they commented on two posts, they both commented and messaged you a keyword, or your setup sends a button first and the link second. Rarely, Instagram reports the same event twice and the DM goes out twice.

## Steps

1. Ask the person, or look in the post's **All Comments** tab: did they comment more than once? Each comment is listed on its own row.
2. Check whether they commented on two different posts. Each post's automation answers its own comments.
3. Check whether they also sent you a DM with a keyword. A comment automation and a DM keyword automation can both answer the same person.
4. Look at what they received. A button card and then a link is one automation working as designed, not a duplicate.
5. If none of these explain it, note the username and time and email hey@instantdm.com.

## Causes

| What happened | Why | Can you change it? |
|---|---|---|
| They commented twice (or more) | Every new matching comment gets a DM and a public reply. There is no once-per-person rule for comments or story replies | No. You can only ask people to comment once |
| They commented on two posts | Each post has its own automation | Expected |
| They commented and also DMed you a keyword | Two different automations each answered | Use different trigger words, or remove one automation |
| They got a button card, then the link | Your **Welcome Message** or flow sends a button first, then the content after the tap | Expected. Turn off the Welcome Message if you want one message |
| They got a "Follow to unlock" card, then the link | Your follow gate is on. They followed and tapped **Started following you! 👍** | Expected |
| They got several messages in a row | Your **DM Sequence** has more than one message | Expected. Remove messages from the sequence |
| An **Any Message** reply came again next day | **Once a day** replies at most once every 24 hours | Switch to **First time only** |
| Rare: the same event answered twice | Instagram sometimes reports the same comment or message twice. For example, sharing your post to your DMs with a note can arrive twice within a second, and an **Any Message** reply can go out twice | No setting prevents this today |

## On the phone app

Home → **Instagram** → **Posts** → tap the post → **Contacts** tab shows each person, their comment and whether the DM was sent. For DM keyword automations, use the **Contacts** button on the automation card.

## Good to know

- A person who comments 3 times gets 3 DMs and 3 public replies.
- **First time only** (for **Any Message** DM automations) replies once per person, ever. **Once a day** replies at most once every 24 hours.
- If another tool is also connected to the same Instagram account (for example ManyChat), it may answer the same people as well.

## What you can't do

- Limit comment or story-reply automations to once per person.
- Guarantee that a person is never messaged twice.

## If it doesn't work

- Many people got duplicates at the same time: email hey@instantdm.com with two or three example usernames and the time.
- See [can an automation reply only once per person?](https://instantdm.com/how-to/reply-only-once-per-person.md) for what the once-per-person options cover.

## Questions people also ask

**Can I make a comment automation reply only once per person?**

No. There is no once-per-person option for comments or story replies. Every new matching comment is answered. DM automations with Any Message have First time only and Once a day.

**Can InstantDM promise a person is never messaged twice?**

No. In rare cases Instagram reports the same comment or message twice, and both can be answered.

**Will resending or re-running send a second DM?**

Resend is only offered for DMs that failed, and it skips the public reply if that already posted. Re-run skips comments already handled, so people should not get a second DM.

## Related guides

- [Can an automation reply only once per person?](https://instantdm.com/how-to/reply-only-once-per-person.md)
- [What is the Welcome Message and should I turn it on?](https://instantdm.com/how-to/welcome-message.md)
- [Why didn't my automation send a DM?](https://instantdm.com/how-to/automation-not-sending.md)
- [How do I auto-reply when someone DMs me a keyword on Instagram?](https://instantdm.com/how-to/dm-keyword-auto-reply.md)