message: Updated returned response
diff: @@ -18,14 +18,14 @@ const Handler: NextApiHandler = async (req: NextApiRequest, res: NextApiResponse
  )
  if (!donation) {
  - res.send('What should happen?')
  - }
  -
  + res.status(404).json({ notFound: true })
  + } else {
  const pdfStream = await renderToStream(
  <Certificate donation={donation} person={donation.person} />,
  )
  res.setHeader('Content-Type', 'application/pdf')
  pdfStream.pipe(res)
  }
  +}
  export default Handler
  