Delete messages

Thanks for posting in the Apple Support Communities denyse99,

If you're referring to the Messages app on your iPhone, you can delete messages with the following steps:

Delete a single message

1: Within a conversation, touch and hold the message bubble to open an options menu.

2: Tap More .

3: Tap the Trash button , then tap Delete Message.

To keep your messages for a certain amount of time, go to Settings, tap Messages, then tap Keep Messages. Then select how long you want to keep your messages.

When you delete a message, the message only disappears from your Messages thread, not from your contacts' threads. To remove a message that you accidentally sent from everyone's threads, use undo send.

If you use Messages in iCloud and delete a message, photo, or conversation on one device, it’s removed from all of your devices.

Delete a conversation

1: Touch and hold the conversation to open an options menu.

2: Tap Delete .

3: Tap Delete once more to confirm.

As long as the conversation isn't pinned, you can also swipe left over the conversation, tap Delete, then tap Delete again to confirm.

To delete more than one conversation, open Messages and tap Edit in the upper-left corner. Tap Select Messages, then tap the circle next to the conversations and tap Delete in the bottom-right corner.

Delete and recover messages on your iPhone or iPad

If you're referring to the Facebook Messenger app, the developer of the Apple will be better source for assistance. You can learn how to connect with an app developer, here: How to contact an app developer

Cheers!