Epson TM-T88V-DT User Manual page 30

When Specifying the Print Job ID
Specification of print job ID is available in the TM-i series (TM-i Firmware Ver.4.1 or later).
When specifying the print job ID, specify Version="2.00" for the <PrintRequestInfo> tag.
It is also required to specify the print job ID in the <Parameter> tag.
<PrintRequestInfo> tag
Specify the print job ID
30
HTTP/1.1 200 OK
Content-Type: text/xml; charset=utf-8
Content-Length: xxx
<?xml version="1.0" encoding="utf-8"?>
<PrintRequestInfo Version="2.00">
<ePOSPrint>
<Parameter>
<devid>local_printer</devid>
<timeout>10000</timeout>
<printjobid>ABC123</printjobid>
</Parameter>
<PrintData>
<epos-print xmlns="http://www.epson-pos.com/schemas/2011/03/epos-print">
.
.
.
</epos-print>
</PrintData>
</ePOSPrint>
</PrintRequestInfo>