Patch an active sender belonging to your account. Send at least one changed field. Both sender types can change phoneNumber or email; individuals can also change firstName, lastName, birthday, or nationality; businesses can change companyName. The response contains success and message, not the updated sender record. Use Get a Cross-border Sender to read it back.

A sender cannot be updated after any cross-border request references it, including a completed request. Contact support if the saved identity needs correction. You can register a different sender for future requests using an unused email; the original sender remains active. type, idType, idCountry, idNumber, registrationNumber, and address are not accepted by this endpoint. An email change must remain unique among active senders in your account.

Sandbox: use the same suffix under /api/sandbox/b2b/cross-border/requests with a sandbox bearer token.

Follow the cross-border sender guide and sandbox testing guide.