Who can issue a BPN?

You need to be a representative of a Department or subsidiary company, with sufficient budgetary authority to pay for the BPN at credit cost, plus the same again for admin to either 3ird Eye or Station Analysis, plus 100c per .1 SCL increase.

Are BPNs filtered before being issued?

Legit BPNs are lodged with the 3ird Eye or Station Analysis control departments before issue -- any queries or refusals will come up then.