delete https://sandbox.finmid.com/api/v2/b2b-payments/sellers/
For deleting an existing seller, you'll only need the seller's ID specified on creation.
Sellers are not deleted instantly but rather marked for deletion. Any open transactions/ payments prevent deletion of the seller until they are completed. If a seller is marked for deletion, no further transactions are possible with this seller, and the seller will be deleted automatically once all open transactions/ payments are completed.