# At-Least-Once Delivery Safety

> The degree to which a message is guaranteed to be delivered at least once, tolerating duplicates.

Record: `lexicon:at-least-once-delivery-safety`
Kind: quality-attribute
Layer: [Execution Core](https://banes-lab.com/records/layer/execution-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-at-least-once-delivery-safety

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Work Distribution](https://banes-lab.com/records/lexicon/work-distribution.md) and before [Event Reliability](https://banes-lab.com/records/lexicon/event-reliability.md).

## Category

- [Event Messaging Async](https://banes-lab.com/records/lexicon-category/event-messaging-async.md)

## Reinforced by

- [Idempotent Consumer](https://banes-lab.com/records/architecture/idempotent-consumer.md)

## Linked from

- [Event / Messaging / Asynchronous Architecture](https://banes-lab.com/ontology/principles/architecture-category-event-messaging-asynchronous-architecture.md)