PCB modified diring fab

@Wali wrote:

Hi,

I have send 2 PCB to be manufactured, and I have been surprised when I have received them because on both of them a copper has been added on both sides.

Files I had sent did have copper on bottom only for the first PCB, and no copper at all for the second PCB.

Is this normal ?
I believed that files where not modified during fab process.

Wali

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