Anonymous:
Which is correct?

Thanks.
Hi,

'in response to' is correct. The structure of the phrase requires the noun' response'.

We are writing in response to your letter.

'respond' is a verb. You could say We are responding to your letter.

Best wishes, Clive
Veteran Member69,557
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Anonymous:
Hi
Is there problem with this?
In response to your email, I have the pleasure to inform you that we have shipped your products.
Hi,

No. It's OK.

Clive
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