Hi @IdaB
The error can usually come from a client cancelling the direct debit. Is everything linked up with GoCardless all OK? Have you had any issues previously?
GoCardless haven’t changed their IDs, although I admit it was tricky to find.
In GoCardless, go to Customers
Then select the name of your customer that you want the ID of. It will then show you a list of bank accounts relating to that customer. Click on the one you wish to enquire about:
And select your mandate:
The ID appears in the URL:
and also at the top of the page (note it’s not the long one next to the Direct Debit logo):
Which in the case I’ve tried, matches what’s already on QuickFile:
It does seem a very log way to try and get a simple ID compared to what it used to be. It may be worth contacting GoCardless and providing them with feedback on this.