the Play store reviews for Curve are attrocious, especially the most recent ones. Looks like Curve is absolutely unusable, for many reasons
https://help.curve.com/en_gb/your-curve-account-verification...
https://www.entrust.com/products/identity-verification?edc_r...
As the second URL suggests, Entrust used to be called Onfido.
https://uk.trustpilot.com/review/onfido.com
Oh dear...