Do all IEEE conferences only have receipts for conference fees and no invoices? I just think intellectuals are easy to bully. shilei86 (contact TA on the site) Originally posted by chan8878 at 2010-07-16 18:16:28: Of course, a receipt is different from an invoice. The invoice issued abroad is just a signed receipt. But if you do it domestically, you usually have an invoice from a conference company. You probably want to evade taxes. They also talk about international practices and think that intellectuals are easy to bully. I guess so. I had no choice but to find the ticket myself. Visitor958 (contact TA on the site) What kind of invoice do you need (signed or stamped receipt)? You can go to the conference affairs team or the chairman during the meeting. It is easy to sign on the spot. It would be difficult not to attend or after the meeting.