# missing_required_input

**HTTP 400** · type `invalid_request_error`

## When

A required field is missing.

## Fix

Send it.

## Where it comes from

- `POST /v1/accounts`: Create an account
- `POST /v1/contacts`: Create a contact
- `POST /v1/invoices`: Create an invoice
- `POST /v1/invoices/{id}/void`: Void an invoice

[All errors](/errors)