Originally Posted by focusv8

It is Parcelforce, They will usually write to you to tell you how much duty to pay (if any due) before they attempt delivery.
You can pay online then they will deliver.

The delivery attempt probably means they have sent the letter as it seems too early for them to be out delivering.
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Originally Posted by Christian and Beccy

It is Parcelforce. Go to Parcelforce website, the USPS tracking number will work on there and probably give you more info.