I'm not that familiar w/eCop but at least Escrow.com has never asked me for that. They supply both parties with a mini-closing statement (it's just an addition/substraction of where the money went, not like a r/e closing statement for sure lol)
As to marketplaces, no one ever has either except for Sedo, a handful of times only. And they always say the buyer wants it, it isn't needed to begin with because both when you buy or sell Sedo creates a pdf statement for the trans, except that when you're the seller it does not display the buyer's info, you need to find out through the WHOIS if you're curious. I've always thought Sedo should not display the name for the other party whether you're buying or selling, but since they've decided to do it for the buyer (to see whom he bought from), they should do it for the seller too. But doing one and not the other is not right. Some sellers want to remain anonymous so many people have a problem with Sedo's invoices showing all that info. They should ONLY let the other party have it (whichever side you're on) IF there's a dispute..... like non-pymt from a buyer or the seller refuses to deliver the domain
Like the guys said, most sellers (even on Sedo) are individuals ....so a WORD template for invoices is enough, even good old Notepad on Windows works lol. They can't demand elaborate stationary or professional invoicing. They always accepted mine, one thing though..... their original request for an invoice for the buyer specifically says you should create a pdf invoice and many guys own Adobe Reader but not the more expensive Acrobat where you can create docs, so they should not ask for that. At the end they just want some sort of statement with your info and the details, even on a blank background. The seller probably is a big guy and needs it for tax declaration purposes if there were to be an audit or something