What happened at the borders?

Going into this adventure we had no idea what to expect at borders. Would we have to pay money? Would they check documents? Would they search the car? Here we'll detail our experiences. Also this may not always be true for everyone, we heard stories of other people crossing the same borders who had completely different experiences to us. NOTE: this is a work in progress, I will add more information and details as and when I have time.

Country Entering	Border	What the law says?	Insurance asked for by border guards?	Money paid at border?	Notes
Serbia	Horgos (E75) Hungarian-Serbian	3rd party insurance mandatory.	No	No	Crossed solo. Straightforward and easy. No mention of green card. No road tax paid and no tolls paid for use of motorways.
Turkey	Ipsala (E84) Greece-Turkey	3rd party insurance mandatory. Tolls payable for motorway usage.	No	No	Crossed solo. Straightforward and easy. No mention of green card. No road tax on border. Turkey has toll motorways which are paid automatically using a HGS pass. We didn't get the pass, instead we drove through the toll gates, with alarms going off every time. We were never stopped and we exited Turkey with no mention of all the missed tolls.
Georgia	Sarpi (E70) Turkey-Georgia	3rd party insurance mandatory.	No	No	Crossed solo. Straightforward and easy. No mention of green card.
Armenia	Gogavan Georgia-Armenia	3rd party insurance mandatory.	No	Road tax: 10,700 AMD (aprox £15)	Crossed solo. Amounts paid for tax varied across different teams. We heard anything from 15 pounds to 40 pounds. Ours was probably cheaper as we had a random Russian footballer translating and helping us. Cash only, but you can use other currencies (Turkish Lira, Georgian Lari, USD, Euro confirmed).
Iran	Noordoz (M2) Armenia-Iran		No	Carnet: 600 euro	Seven rally cars crossing together. Carnet payment is by cash, no cash points available. Fixers can sort carnet for varying prices. With hindsight we wouldn't have pre-arranged as there were fixers who would do it for around 250 USD.
Turkmenistan	Bajgiran (Quchan-Bajgiran Road) Iran-Turkmenistan		No	Road tax: $135 Visa: $97	Seven rally cars crossing together. Long process, cash only, no way to get cash either if you are stuck. Picky about quality of notes. Brits will also have to pay $97 for visa.
Uzbekistan	Farab (M37) Turkmenistan-Uzbekistan		No	No	Three rally cars crossing together. Agents trying to sell insurance certificate after border. Several teams did not bother and were never asked for proof of insurance
Tajikistan	Tursunzoda (M41) Uzbekistan- Tajikistan		No	Road tax: $20	Four rally cars crossing together. Attempted bribes on exiting the country, with the guard suggesting we didn't have receipts for all manner of things. We ended up bartering down from 100 USD per car to approximately 5 USD for four cars! If we held out for longer it would have been zero.
Kyrgyzstan	(M41) Tajikistan-Kyrgyzstan		No	Road tax: $20	Four rally cars crossing together. Professional (they had computers and passport scanners)  and welcoming border. Reports other teams 'lost' items during car search, but we (and 3 other cars) were absolutely fine.
Kazakhstan	Karkara (A362) Kyrgyzstan-Kazakhstan		No	No	Crossed solo. Need to fill out a customs form, makes life easier if you have it later on (for Russia/Mongolia), but can get away without it. Professional and welcoming border, with the customs guard trying to teach us lots of Kazakh words.
Russia	Kazakhstan-Russia AND Mongolia-Russia	3rd party insurance mandatory.	No	No	Three rally cars crossing together. Stopped by police 3 times whilst in Russia (all whilst driving back to the UK), no time did they ask for insurance or tax.
Mongolia	Khyagt (A-340) Russia-Mongolia		No	Car cleaning: X dollar	Crossed with two rally cars. Agents after border peddling tax and insurance, many teams ignored and drove on without any problems. Other teams paid $x for tax, $x for insurance.