Question 1: As long as you have a complete authorization chain or invoice chain, it is ok. Must be complete! ~ For example, if you want to sell Dove chocolate, the brand of Dove chocolate must authorize China Company, China Company to authorize a provincial agent, the provincial agent to authorize a city agent, and the city agent to authorize you. The invoice is the same, the provincial company purchases the invoice from the national head office, the municipal company purchases the invoice from the provincial company, and the municipal company purchases the invoice!

Question 2: To be honest, even if I had such complete information, you wouldn't sell it to you, and it was only 1500 yuan. This is a legal responsibility. If you sell it adulterated, the person who gave you the information will be jointly and severally liable.