post https://api.sumsub.com/resources/kyt/txns//applicantId/
Associates an incoming transaction with an existing applicant.
Overview
Use this method to avoid creating a new applicant for each incoming transaction. In case the beneficiary of the transaction is one of your applicants who passed Sumsub KYC, you easily associate them with the transaction.
The data we exchange includes the Sumsub transaction ID and the Sumsub applicant ID.