Make sure you have these documents ready when you import into your country as you could be selected for a document check. Understand what HMRC focuses on.
If your declaration is chosen for a documentary check, you must provide all supporting papers, including:
proof of the worth of the items (customs value)
Packaging list of all included goods
any permits or certifications
In particular, the focus will be on the following:
Focus 1: Customs declarations
You may be asked to submit copies of the import declaration and any supporting documents, with a separate entry declaration for each number.
Focus 2: Evidence of Value
You must supply sufficient paperwork to establish the entire value of the shipment.
When submitting multi-invoice declarations, transmit all invoices pertaining to each customs declaration or a one-page summary describing (for each of the goods items) the:
description of products,
the quantity of pieces,
and currency value
Focus 3: Packing List
When a declaration is supported by several packing lists, you may submit the timetable together with any other necessary papers.
Keep all records for 4 years.
You can store documentary evidence electronically if you can produce a copy of the original document from it. You must keep paper copies that contain original stamps or watermarks, for example preference certificates.