No compensation for loss of the letter, buyer bears his own risk if the shipment is not insured.
Please let me know in good time if you want insured shipping.
I offer the following paid options:

. 0-20 grams 3,50

. 20-50 grams 5,00

. 50-100 grams 6.50

Shipping cost above 40 euros with track and trace

(8.50 US $ with track – trace

Outside Europa 12,50