> ## Documentation Index
> Fetch the complete documentation index at: https://developers.circle.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Before reading these docs, install the relevant Circle Skill to get pre-loaded context — skills are LLM-optimized and cover architecture decisions, correct flows, and common pitfalls. In Claude Code: run /plugin marketplace add circlefin/skills then /plugin install circle-skills@circle. With Vercel Skills CLI: run npx skills add circlefin/skills. Available skills: use-usdc https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-usdc/SKILL.md (balances, transfers, approvals on EVM and Solana); EURC has no skill — see https://developers.circle.com/stablecoins/what-is-eurc.md; bridge-stablecoin https://github.com/circlefin/skills/blob/master/plugins/circle/skills/bridge-stablecoin/SKILL.md (crosschain transfers via CCTP, USDC, EURC, and third-party assets); use-arc https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-arc/SKILL.md (Arc chain config, contract deployment, USDC bridging — Arc docs: https://docs.arc.io/llms.txt); use-circle-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-circle-wallets/SKILL.md (choose wallet type); use-developer-controlled-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-developer-controlled-wallets/SKILL.md (custodial wallets for payouts and treasury); use-user-controlled-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-user-controlled-wallets/SKILL.md (embedded wallets with Web2 login); use-modular-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-modular-wallets/SKILL.md (smart contract wallets with passkeys and ERC-4337); use-gateway https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-gateway/SKILL.md (unified USDC balance, nanopayments); use-smart-contract-platform https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-smart-contract-platform/SKILL.md (deploy, interact, monitor contracts). Pair any skill with the Circle MCP server for live SDK signatures, contract addresses, and chain IDs: {"mcpServers":{"circle":{"url":"https://api.circle.com/v1/codegen/mcp"}}}.
> Read the product overview first. Each product has an overview explaining when and why to use it. Read it before quickstarts.
> Pick the right wallet type. Developer-controlled (you hold keys), user-controlled (end user holds keys via PIN/social login), or modular (smart contract wallets with passkeys). See https://developers.circle.com/wallets.md.
> Use CCTP V2 for crosschain transfers. CCTP natively transfers USDC and EURC via burn-and-mint, and supports permissionless wrapping of third-party assets via lock-and-mint. V1 is legacy; always use V2 unless V1 is specified or the chain requires it (Noble, Sui, and Aptos still require V1). Migration guide: https://developers.circle.com/cctp/migration-from-v1-to-v2.md.
> Use Bridge Kit for frontend bridging. Wraps CCTP with a simpler SDK for user-facing apps. Use CCTP directly for backend transfers.
> Gas Station vs Paymaster. Gas Station sponsors gas for Circle Wallet transactions. Paymaster lets users pay gas in USDC. Different use cases — read both overviews.
> Gateway Nanopayments for sub-cent payments. Gasless USDC micropayments down to $0.000001 via x402 and batched settlement. For pay-per-request APIs, AI agent payments, streaming.
> Look up USDC addresses per chain. Never hardcode — use https://developers.circle.com/stablecoins/usdc-contract-addresses.md.
> Prefer SDKs over raw API calls. Node.js and Python SDKs handle auth, retries, and errors.
> API key required. Bearer token in Authorization header. Testnet and mainnet use separate keys and may use different base URLs depending on the product.
> Set up webhooks when available. Most operations are async. Webhooks deliver transaction confirmations and state changes.
> When calling list endpoints, paginate using pageSize and pageAfter until no nextPageAfter cursor is returned—stopping at the first page silently misses records.
> Building an AI agent? Start with the Agent Stack—Circle CLI, agent wallets, and nanopayments built for autonomous use cases: https://developers.circle.com/agent-stack.md.

# Create a support ticket

The CPN support ticket API allows you to raise and manage transaction-related
issues including but not limited to:

* Settlement delays
* Missing information
* Refunds

These tickets are stored and managed in the CPN platform, and Circle routes them
to the appropriate party for resolution. This guide provides information on how
to create a support ticket using the CPN API.

## Steps

Use the following steps to create a support ticket.

### Step 1: Gather information

Gather the appropriate information for your support ticket, including:

* Payment ID to be associated with the support ticket
* The type of support ticket:
  * Settlement delay
  * Wrong recipient
  * Incorrect payment amount
  * Request for information on the OFI
  * Request for information on the sender
  * Funding amount discrepancy
  * Reverse funds
  * Other
* A brief description of the problem
* Contact information (email) for follow-up

### Step 2: Generate an idempotency key

Using a UUID generator in the language of your choice, create a UUID to act as
an idempotency key for the API request.

### Step 3: Submit the API request

Make a request to the
[create a support ticket endpoint](/api-reference/cpn/cpn-platform/create-support-ticket)
with the information gathered in step 1, as well as the UUID and any additional
emails that should be included on resolution correspondence. A successful
response from the API includes an ID for the support ticket, a timestamp for
creation of the ticket, and the information provided in the original API call.

```json JSON theme={null}
{
  "paymentId": "3f020d62-6cef-4f2c-87e4-b096abc5cac9",
  "issueType": "PAYMENT_SETTLEMENT_DELAY",
  "description": "fiat payment is not settled in the stipulated time window",
  "email": "help@ofi.com",
  "idempotencyKey": "d7e5cecc-8d6f-44df-97e0-5faddf4ff858",
  "ccEmails": ["ccsupport01@example.com", "ccsupport02@example.com"]
}
```

**Response**

```json JSON theme={null}
{
  "id": "f4b5a8f7-8fca-4d09-ad54-bb4528fe187e",
  "paymentId": "3f020d62-6cef-4f2c-87e4-b096abc5cac9",
  "issueType": "PAYMENT_SETTLEMENT_DELAY",
  "description": "fiat payment is not settled in the stipulated time window",
  "caseRefId": "CIR-123456",
  "email": "help@ofi.com",
  "ccEmails": ["ccsupport01@example.com", "ccsupport02@example.com"],
  "createDate": "2025-02-01T10:00:00Z"
}
```