A lot of buyer message seller for ordering but they said their account have not enough money yet for the order, and will order as soon as they got enough money.
Even though they sound so promising, gave all the correct information for your order, you STILL do not do the order first.
99% they will run away and not reply you.
I encountered one buyer recently, first he messaged me on fiverr about order information, then suddenly the search my FB and message in on FB and he said he want to deal with paypal instead and save Fiverr charges!
I of course denied his request and ask him we only able to deal within Fiverr site, then he gave me all his photos and said his fiverr not enough money yet, tomorrow will order.
As I expected, he has no news even though I message him after the days and he seem disappeared.