How to write proof that the photographic equipment is your own?

Write a certificate for your own things? Isn't this a little self-talk? However, if your equipment has a purchase invoice, then things are simple.

certificate

This is to certify that the following photographic equipment is owned by XXX.

1, Nikon D5 SLR body price: 35,000 yuan, place of purchase: XXX, invoice number: XXXXXXX.

2. Nikon AF-S 24-70 mm f2.8 G lens, price: 13000 yuan, purchase address: XXX, invoice number: XXXXXXX.

..........

Reference: XXX

date month year