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

# Delegated Issuance

> A workflow in which a platform issues tax invoices via standard issuance on behalf of the supplier.

A scenario in which a platform issues tax invoices on behalf of the supplier, such as in logistics platforms, freelancer matching services, or marketplaces.

## Workflow

<Steps>
  <Step title="Register the issuer" icon="code">
    Call the [Register Issuer API](/en/api-reference/issuer/register-issuer) to register the supplier as an issuer. Save the returned `issuerId` for certificate management.
  </Step>

  <Step title="Issue a certificate registration URL" icon="code">
    Use `issuerId` with the [Retrieve Issuer Certificate Registration URL API](/en/api-reference/certificate/retrieve-issuer-certificate-registration-url) to obtain a URL where the supplier can register their certificate.
  </Step>

  <Step title="Supplier registers the certificate" icon="user-check">
    The supplier visits the issued URL and registers their certificate directly. For the redirect return and result verification after registration, see [Certificate Registration Integration](/en/docs/api-introduction/certificate-registration).
  </Step>

  <Step title="Delegated standard issuance" icon="code">
    Call the [Issue Tax Invoice API](/en/api-reference/tax-invoice-issuance/issue-tax-invoice) to issue the tax invoice to the counterparty.
  </Step>

  <Step title="Receive the issuance-complete webhook" icon="zap">
    Once issuance is complete, Bolta sends a [webhook](/en/docs/api-introduction/webhook-tax-invoice) notification containing `taxInvoiceUrl`.
  </Step>

  <Step title="Issuance-complete email" icon="mail">
    Bolta automatically emails the counterparty to announce receipt of the tax invoice.
  </Step>

  <Step title="Retrieve the tax invoice (optional)" icon="search">
    Check the issuance result with the [Retrieve Tax Invoice API](/en/api-reference/tax-invoice-retrieval/retrieve-tax-invoice).
  </Step>
</Steps>

## When It Fits

* When a logistics platform issues tax invoices on behalf of truck drivers
* When a freelancer matching service issues on behalf of freelancers
* When a marketplace automates tax invoice issuance for its sellers
* When a platform manages many suppliers
* When it is difficult for suppliers to issue tax invoices individually

## Key Points

* Use each supplier's `issuerId` to register, retrieve, or remove its certificate
* When a supplier's certificate expires, it must be re-registered