Scrapyards that signed up to the scheme request a passport, national identity card or photo driving licence, as well as proof of address.

BBC: Church lead thefts 'drop by 70%' in Cornwall

The higher fees and burdensome documentation requirements--such as proof of address and Social Security cards--pushed immigrants into informal channels to send money overseas more quickly, less expensively and with fewer questions.

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Either the potential bride or groom must prove that that they have been living in the area for at least a week by supplying proof of address, such as a utility bill, and must provide a passport or ID card and proof of work.

BBC: NEWS | UK | Beating the sham wedding cheats

Several state governments have recognised Aadhaar as sufficient proof of identity and address for various social schemes.

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Christine has sent several emails to the address where the proof-of-life video came from to ask the senders what they want.

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When Finance Minister Evangelos Venizelos recently went to a hotel on the outskirts of Athens to address a conference, his security official would not open the door of his bullet-proof BMW until they had checked for potential attackers.

BBC: The Greek conundrum