I'm expected a parcel from the USA. Sent around 20 August 2015.

The sender sent using normal mail by mistake so no tracking number was given. I know that when I've ordered from online stores and used normal post for delivery it can easily take 8 weeks to arrive.

My question is, yes I know that its only been 6 weeks, but is there anyway at all to try and see if package has arrived at customs / what the progress is?

I've been to the local post office earlier this week to check the "receipts book" but no luck.