Nuvei currently does not support the following features.
Idempotency - Nuvei does not support retrying the same transaction to get the original response. Nuvei does support rejecting multiple
transactions with the same clientRequestId. Please ask to have this enabled if needed.
Co-badged card routing - Nuvei currently does not support co-badged card routing (merchant preferred routing) though we are looking to add this soon.
Billing fields - Nuvei currently requires all transactions to contain a billing country and email, so these should be requested to the user and sent through accordingly.