For business users:
For SEB Foretag/business you have to submit "Företagens ID", which is listed as a 14 digit number.
The first 10 digits are the Swedish Organisation Number.
The last 4 digits either have to be "0004" or "0009" depending on your business structure (A personal company need to use 0009 otherwise 0004).
This information is based on communication from SEB to us. If you find any contradictory information, please let us know and we will update this guide.