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

# Document kinds

> Income invoices, payment complements, and credits share one stamping pipeline.

Every stamped document travels the same pipeline: CargoWise sends it, Lambda checks it, Facturapi issues the CFDI when eligible, and Lambda returns the files.

What changes is the **shape** of the document and what “success” looks like in the workspace.

## The three shapes

| From CargoWise           | Lambda treats it as                           | Typical success                     |
| ------------------------ | --------------------------------------------- | ----------------------------------- |
| Unstamped income invoice | Income stamp                                  | **Stamped**                         |
| Payment receipt          | Payment complement (REP) when PPD lines apply | **Applied**                         |
| Credit or cancel path    | Credit completion or CFDI cancellation        | **Credit completed**, **Cancelled** |

A Government Number already present from outside Lambda is recorded as **Stamped externally** — Lambda does not create another CFDI. See [External stamps](/stamping/special/external-stamps).

## Follow a path

<CardGroup cols={1}>
  <Card title="Income invoices" icon="file-invoice" href="/stamping/income-invoices">
    Follow an unstamped bill from CargoWise through stamp and delivery.
  </Card>

  <Card title="Payment complements" icon="money-bill" href="/stamping/payment-complements">
    Follow a receipt into a REP, including PPD vs PUE and waiting for parents.
  </Card>

  <Card title="Credits and cancellations" icon="ban" href="/stamping/credits-and-cancellations">
    Follow credit completion, SAT cancellation, and blocked chains.
  </Card>
</CardGroup>

Ordinary guides stay on the happy path. Lambda-only quirks (parent-cancel full credits, REP windows, reversals, EXX lines) live under [Special behaviors](/stamping/special/overview).