What is the Nabisy Interface-ID? 

The Interface ID is the ID associated with your Nabisy account. You obtain your Interface ID by appending your ISCC registration number to the EU-BM-13-SSt or EU-BM-13-Lfr format, depending on whether your company is a Producer (SSt) or Trader (Lfr). 
If your ISCC registration number is four digits, prefix it with “1000”; if your ISCC registration number is five digits, prefix it with “100”.  
Your Interface-ID should then look like this: 

EU-BM-13-Lfr-1000xxxx, EU-BM-13-SSt-1000xxxx, EU-BM-13-SSt-100xxxxx or EU-BM-13-Lfr-100xxxxx.