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

# Appointment Payment Link Cooling Down

> A payment link was recently sent for this appointment

## Cause

This appointment is waiting through its payment-link send backoff window.

## Fix

Wait until the appointment's `nextAvailableAt` date-time before scheduling another send.

## Retry safety

Safe to retry as-is after a short wait if the server asked you to back off.

## Raised by

These operations can return this problem:

* [Schedule an appointment payment link](/api-reference/appointments/schedule-an-appointment-payment-link)

## Example

```json theme={null}
{
  "type": "https://docs.guile.app/problems/appointmentPaymentLinkCoolingDown",
  "title": "Appointment Payment Link Cooling Down",
  "status": 409,
  "detail": "This appointment is waiting through its payment-link send backoff window."
}
```