We are using providerId as the transactionId on transactions returned by your API.
This value seems to change on every request.
In the text file attached you can see 3 separate requests that return the same transaction but the providerId returned is different in each case.
The fapiInteractionId's are as follows:
Could you please shed some light on why the id is changing and recommend what we should be using as a transactionId
Our clients are unable to use the API for verification of transactions because the providerId that is returned by the RBS Group changes on each request. We are therefore unable to determine on subsequent requests if the transactions are the same.
This is impacting all of our clients using RBS Group connections.