People, it's time to start closing-as-(near-)duplicate, and identifying canonical questions and titles, among the following:
- would my paper be published if I faild to attend the conference because of Visa related problems? UPDATE: turns out this is more like "Conference organizer is failing to send me invitation letter which I need for visa; how to proceed; will my paper not be published?"
- "If a paper is accepted as a poster, must you attend the conference?"
- What to do if I can't get a visa to attend a conference that accepted my paper? which in turn references...
- Etiquette when unable to attend a conference
There is a nuance with #2,3,4 that:
a) OP may or may not have coauthor(s)/colleague/supervisor attending who can present (although they may not do a great job) or:
b) rarely confs allow Skype or (recorded-)video presentations, although those may not be great options.
Usually the main, explicit or implicit question is "Will my paper still be published?", but sometimes people are also asking "Can I get a refund on the fee?", and that depends on circumstances (e.g. does a visa refusal or other unforeseen emergency qualify?).
Occasionally people are asking along the lines of "I submitted the same paper to both a journal and a conf as a fallback, unexpectedly got accepted to the journal, now what do I do about the conf?", which is different.