A very polite young man introduced himself as John from SES. He said I could donate minimum $10 or order raffle tickets for $15 each. He said that if I'm reluctant to pay over the phone, he could mail me the relevant documents. I asked him to email email me. He said they cannot do anything without my full name and address. When I said I don't wish to disclose my address, he said "That's OK. You can just give me your full name and your neighbour's address, then pick it up from your neighbour."