you can buy documents of other people .
try to inquire in service section but im not sure if selling and buying of documents is allowed in here . if its not your last option is play on a gambling site that dont ask for documents but read the terms because some of them dont allow multiple accounts . borrowing your friends documents is not a good idea because they can be in trouble .
do you want to risk your friends documents if your a real friend ?
Most of the gambling site didn't require any documents but since OP is playing on Bet365 I guess documents is needed and buying might not be a good option because that's too risky. I don't know why do you need to create multiple accounts but this is alarming, because this can be used for fraud and the seller of documents might be on a big trouble if they did it, so if you're planning something bad please don't involve innocent people just enjoy gambling without harming anyone.