# Guaranteed Delivery

Note: For full end-to-end certified delivery from Rendezvous to EMS, all three of these conditions must be true:

- Rendezvous senders must send labeled messages on RVCM transports. See the TIBCO Rendezvous Concepts manual for more information.
- The transport definition must set `topic_import_dm` or `queue_import_dm` (as appropriate) to `TIBEMS_PERSISTENT`.
- Either a durable queue or a subscriber for the EMS topic must exist.

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