---
title: "Complete the session: pay by invoice (purchase_order_number) or with a shared payment token."
method: POST
path: "/acp/checkout_sessions/{id}/complete"
tags: ["AcpCheckout"]
---

# Complete the session: pay by invoice (purchase_order_number) or with a shared payment token.

`POST /acp/checkout_sessions/{id}/complete`

## Request

- Base URL: `https://api2.globalfinreg.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api2.globalfinreg.com/acp/checkout_sessions/{id}/complete`
- Auth: API key in header `Authorization`

## Path parameters

- `id` string, required

## Headers

- `x-imp-userid` string

## Request body

- AcpCompleteRequest
  - `paymentData` AcpPaymentData
    - `handlerId` string, nullable
    - `instrument` AcpInstrument
      - `type` string, nullable
      - `credential` AcpCredential
        - `type` string, nullable
        - `token` string, nullable
    - `purchaseOrderNumber` string, nullable

## Response `200`

The completed session with its order

## Other responses

- `405`: The session is already completed or canceled, or has expired

---

[API](https://skmtc.dev/globalfinreg/apis/registration-agents-api-documentation.md) · [All operations](https://skmtc.dev/globalfinreg/apis/registration-agents-api-documentation/llms.txt) · [OpenAPI document](https://skmtc.dev/globalfinreg/apis/registration-agents-api-documentation/revisions/97e306fd0c82?raw)