# [Financial Crime](../domain.md)

## Entities

### Payer

A Payer is a Party Role representing the party from whom funds are debited in a transaction.

```mermaid
---
config:
  layout: elk
---
classDiagram
  class Payer{
    * Payer Identifier : string
    Funding Source Reference : string
  }

  Payer --|> PartyRole

  class PartyRole["<a href='https://github.com/Semprini/md-ddl/blob/main/examples/Financial%20Crime/entities/party_role.md'>Party Role</a>"]
```

```yaml
extends: Party Role
existence: independent
mutability: slowly_changing
attributes:
  Payer Identifier:
    type: string
    identifier: primary
    description: Unique identifier for the payer role instance.

  Funding Source Reference:
    type: string
    description: Reference to the source account or instrument used to fund payments.
```

```yaml
governance:
  retention_basis: Inherited from domain default retention of 10 years post relationship end for AML/CTF record-keeping
```

## Relationships

No relationships are sourced directly from Payer. The canonical direction is Transaction-owned — see [Transaction Has Debtor](transaction.md#transaction-has-debtor).