Which is the valid proper address proof for an partnership f

I have a partnership company.we purchase an motorcycle for gifting our employ.after delivery they deny to bill in the name of our company.we also provide payment from our company account.after so many request they told us that they will provide bill in the name of our company.after that we also give company GST certificate,Professional tax Certificate and latest bank statements.but manager of the showroom said me that Any business government authentic document is only the trade licence. So, please provide us the same.is that true....??