Agreed with
GingerBubba (renew your supporter status you twat !) a little breathing is required here.
A few minutes of research on the forum would have yield some results on how to deal with this and what it actually is.
Big brands do outsource this kind of works because their more "classical" lawyers are busy with things way more important than a few watches seized, but they still don't want to let that go.
Just think about the non informed people, ordering a lot of watches at once, getting seized, and like most people having no idea of the gravity of those facts : the letter is probably very effective and I bet a lot of people are paying it, so for the brands, it's worth it and that way they look like they act on the front of counterfeit product, even though they really don't care.
Don't answer this, it doesn't matter that you've signed a letter, like anyone, you receive a letter, you sign for it, doesn't mean you agree with the content, it just mean, you acknowledged getting a letter, that's just a line of defense they don't want you to use.
For customs fine, they rarely pursue the offence even if they sent a letter demanding payment.
Now if you were to get caught again, that would be another story
Oh and just to be complete : paying a fine is never an admission of guilt