i got a call from this number about an invoice for advertising, i had no clue who the heck they were so i did some research..turns out blue yellow book and bizadvertizing are sister companies yet are not the same as they have different owners operators etc..(or so my lawyer tells me) regardless i did list my company with them almost a full year ago and i had documents in my office to prove it.Although i wasnt pleased to receive this bill i know i was responsible for it and i couldnt use past issues on a sister company against them