If your carrier integration stops working, it is almost always due to changed or incorrect credentials. Here is how to diagnose and fix it.

Symptoms

  • No services appear when you select a carrier and destination
  • An error appears saying "authentication failed", "invalid credentials", or "unauthorized"
  • Labels that previously worked suddenly fail to create

Step-by-step fix

  1. 1Go to Settings → Integrations and open the affected carrier
  2. 2Click Test connection — the result tells you immediately whether the saved credentials work
  3. 3If the test fails, log in to your carrier portal (PostNord customer portal, mybring.com, dao.as) and verify each value
  4. 4Re-enter the corrected credentials on the carrier page and save
  5. 5Run Test connection again, then create a test shipment to verify services load

Carrier-specific checks

  • PostNord — make sure the Country matches the PostNord company your agreement is with (e.g. PostNord Denmark), and that the Customer ID is the customer number from your business agreement
  • Bring — the API UID is your Mybring login email; check the API key in your Mybring profile is still active
  • DAO — verify the kundeid and API password (kode) under API access on dao.as; API access must be enabled by DAO

Test mode

If bookings succeed but no real barcodes are created, check whether Test mode is still enabled in the carrier preferences.

Still not working?

If credentials look correct but the connection still fails, contact us at support@shipcelero.com with the carrier name and the error message you are seeing.