# Sequences

A Sequence is used to group invoices in a sequential order.

## Register Sequence

 - [PUT /sequences/{sequence_id}/register.json](https://docs.invoicexpress.com/sequences/registersequence.md): Registers a document sequence with the Tax Authority (AT).

## List All Sequences

 - [GET /sequences.json](https://docs.invoicexpress.com/sequences/listsequences.md): Returns all your sequences.

## Create Sequence

 - [POST /sequences.json](https://docs.invoicexpress.com/sequences/createsequence.md): Creates and registers a new sequence. 
For portuguese accounts, it’s necessary to have AT credentials configured.

## Get Sequence

 - [GET /sequences/{sequence_id}.json](https://docs.invoicexpress.com/sequences/getsequence.md): Returns a specific sequence.

## Set Sequence as Default

 - [PUT /sequences/{sequence_id}/set_current.json](https://docs.invoicexpress.com/sequences/setsequencedefault.md): Sets a specific sequence as the default.