http://e3lnwcbat7ow5cikeb4jplrxtaf7ydoyhprbcegk4lcbzg22pvrz2tyd.onion/en/proof-before-payment.html
In most cases, the client will have the option to pay upfront, thus obtaining a discount, or they may choose to receive a proof before paying but, by doing this, the price will be a little higher. The decision whether to pay upfront or receive a proof before payment is an option that each client can make at their sole discretion .