I work for a few small companies and luckily for me, they are all very strict on their licensing compliance requirements.
A few however did not keep their receipts easily accessible which is pretty much what the BSA looks for. Original CDs, certs of authenticity apparently don't cut it. We spent some time and was able to get all the documentation ready just in case.
I cannot conceive that anybody will require multiplications at the rate of 40,000 or even 4,000 per hour ... -- F. H. Wales (1936)