We collected religiously every confirmation paper from every hotel or any other place where we stayed. Had a bunch of colourfull notes in our passports. No one was ever interested in them. Not border police, nor customs officers. But I believe it is better to have them than not.

However, it is very important that you completely fill in your immigration forms when entering Uzbekistan, especially the part where you declare the amount of foreign currency that you have with you. It is probably safest to declare every dime, which we did not do, as we had quite a lot of cash. Yet, I did not get the impression that we were going to be checked by custom officers for the money. Anyway, do declare a reasonable amount, according to the length of your stay. That part of the declaration was really the only thing that was interesting to the authorities when we were leaving the country.

Speaking of money, Uzbekistan is one of those countries where you don't change money in the bank, but on the street, or hotel receptions, or wherever. It is not actually black market, as these "black market" rates are calculated everywhere, nobody takes the official exchange rate seriously. Be prepared to get a kilo or two of banknotes for a single 100 Euro bill. By the way, that part of the world likes USD, Euros are ok, but GBP or CHF might rise an eyebrow or two, or even be difficult to change.

Uzbek customs are also very interested in any medicine that you might have with you, so there will be silly questions.

They also completely checked my laptop, every file and every program. Who knows what terrible secrets a motorcyclist might carry with him!