[mothered]

Spoiler:

the big title says "lawful declaration - order not or partially delivered"

Yes, fill it out. I have filled it out twice for items worth well over €1000 in total. They just need it to refund you

Spoiler:

the big title says "lawful declaration - order not or partially delivered"

Provided It's not an affidavit, It's fine.

Pretty sure it's safe to sign, I heard about Zalando doing this.

I've filled it out and sent it, now it's waiting for a response.

When you get a chance, do keep us updated.