> For the complete documentation index, see [llms.txt](https://docs.neox.vn/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.neox.vn/docs/collections.md).

# Collections

**Collection** is a service that a Merchant (individuals or organization) permits to collect contractual payments. These collecting authorizations are explicitly established in certain documents.

There are two types of collection: online collection and offline collection:

* **Offline collection:** comprises services such as transportation service collection, delivery and collection of COD payments...
* **Online collection:** comprises services such as bank transfer, pay electricity, water, and other utility bills...