Can my father pay the fine in Hangzhou Nanjiao Prison and send him an electronic invoice?

Mail can be sent to the detention center.

But in the detention center, the post office is required for sending letters or express delivery. When mailing letters or items, make sure there are no prohibited items or other things that violate regulations. If there are any, they will be withheld.

Electronic invoices can be used for fine invoices submitted by prisoners. The normal procedure is that after you pay in cash or UnionPay transfer to fulfill your property sentence, and the court receives the fine in full, it will issue you a fine payment slip. You must mail this slip (to ensure safety, preferably by registered mail or EMS) to him. The prison where he is serving his sentence will put this list into his file after receiving it.