---
title: "Resume an A2P Campaign Registration embedded compliance session. Returns the existing active session if one is still valid, or creates a new session if the previous one has expired."
method: POST
path: "/v1/A2PCampaignRegistrations/{Id}/EmbeddedSessions"
tags: ["TrusthubV1A2PCampaignRegistrationEmbeddedSessions"]
---

# Resume an A2P Campaign Registration embedded compliance session. Returns the existing active session if one is still valid, or creates a new session if the previous one has expired.

`POST /v1/A2PCampaignRegistrations/{Id}/EmbeddedSessions`

## Request

- Base URL: `https://trusthub.twilio.com`
- URL: `https://trusthub.twilio.com/v1/A2PCampaignRegistrations/{Id}/EmbeddedSessions`
- Auth: HTTP basic

Resume an A2P Campaign Registration embedded compliance session. Returns the existing active session if one is still valid, or creates a new session if the previous one has expired.

## Path parameters

- `Id` string, required

## Response `200`

OK

- TrusthubV1A2pEmbeddedSession
  - `id` string, nullable: The unique A2P Brand or Campaign Registration identifier, formatted as `tri1.us1.account.AC.../registration.BU...`.
  - `sessionId` string, nullable: The Persona inquiry ID used to start the embedded compliance session.
  - `sessionToken` string, nullable: The Persona session token for embedding the compliance UI. Expires in 24 hours.

## Other responses

- `400`: Bad Request - Registration is in a non-resumable state
- `401`: Unauthorized - Invalid credentials
- `403`: Forbidden - Account not enabled for A2P embeddable v2
- `404`: Not Found - A2P Campaign Registration does not exist
- `500`: Internal Server Error

## Changes

- **2026-08-11** (v1) `efbeb2fac001`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/twilio/apis/trusthub-v1/changes/v1/A2PCampaignRegistrations/:Id/EmbeddedSessions/post.md)

---

[API](https://skmtc.dev/twilio/apis/trusthub-v1.md) - [All operations](https://skmtc.dev/twilio/apis/trusthub-v1/llms.txt) - [OpenAPI document](https://skmtc.dev/twilio/apis/trusthub-v1/revisions/efbeb2fac001?raw)