For the website http://www.hotelintransylvania.com I need to:
1- send a unique code automatically at the end of payment with paypal
2- during the registration process of the clients, ask (trhough a custom field) the fiscal code or italian vat, plus name and address necessaries to send the invoice
3- send the invoice trough email automatically from the eshop at the end of payment
4- monthly payments trough paypal, for example 300$ payed in 10 times of 30$ monthly.