The separator line starts a new receipt with a caption:

Receipt Line
{
"type": "separator",
"value": {
"caption": "Kundenkarte Aufladung"
}
}

The separator line is like a headline. It needs to be centered, and is printed bolder and larger than normal text. It should be padded with some space at the top and the bottom.

The attribute caption is optional:

Receipt Line
{
"type": "separator",
"value": {
}
}

If there is no caption, you can print a horizontal line instead, or just a number of dashes.

Separator lines have no decorations.