本人想提取我在新西兰的全部费用
I would like to withdraw all of my the costs in New Zealand
包括homestay的费用
including the cost of homestay.
我愿意自己支付
I'm willing to pay by myself.
包括在homestay的责任由我本人负责
I will also be responsible for my duties at homestay.
特此证明
This is to comfirmed the above.
英文信件落款时不用这种说法,一般会说“Regards”.