How to get confirmation of receipt of acts by a foreign customer?

Question

Outsourcing

Good afternoon. I need to send certificates of completed work abroad by physical mail. As a result, I must have a document confirming that such and such documents were sent from my legal entity, and the legal entity of the recipient received them. This means that there must be an inventory of the attachment and a signature on receipt. The problem is that courier services do not have a place in the invoice for transferring attachments, and the inventory on a separate sheet has no legal force and / or is not available as a service for international shipments.

Answer 1

If you send by dhl:
ACCOMPANYING DOCUMENTS img
What documents may be required when processing an export shipment through the DHL network?
The Sender may be required to provide the following documents: invoice, proforma invoice, packing list, certificates, customs declaration.
When is it necessary to submit a Commercial Invoice/Proforma Invoice?
— An invoice or proforma invoice is a mandatory document that accompanies the package. This document indicates the sender / recipient, detailed characteristics of the cargo, as well as the estimated value of the cargo.
In what cases is it necessary to provide a Packing List?
If you are sending personal items, they must be accompanied by a Packing List, which is a list that lists all the items in the package, as well as their quantity.
If by Russian Post:
How to send
Buy any envelope of a suitable size, attach a letter and write the address. You can buy an envelope at the post office.
Give the envelope with the letter to the post office employee and state the amount of declared value in rubles that you want to receive as compensation in case of loss or damage to the letter.
If you need a notification of delivery, take the notification form on the table in the post office (for shipments within Russia - the form f. 119, for shipments abroad - the CN 07 form), fill it out and give it along with the letter to the Postal employee.
If you need an inventory of the attachment, fill out 2 copies of the inventory form (f. 107) and send it along with the letter to the operator. Or fill out the forms on the website.
ATTENTION! A letter with a list of attachments is sent to the department employee in clear form for verification.
If you need a cash on delivery service, tell the operator the amount of cash on delivery in rubles.
If SMS notification is required, fill in the SMS notification form and hand it over to the operator.

Answer 2

there will be no inventory abroad - customs, sir,
therefore, either scans or reciprocal confirmation lette

Answer 3

Submit documents with attachment description and confirmation form.