Dear K Nuch
Here in below is first investigate from our WH (Banhkhen). In fact, all invoice are against with our originals at customer site. However, salesman is responsible for event team and under K Trirong supervision. I am not petty sure on his intention why they did like this. So I have assigned my WH to ask K Trirong and that salesman to talk about root cause and will be feedback you again ASAP
Regards,
Manop
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