Whether you get an evite or a formal printed invitation, it’s considerate to tell the host as soon as you can whether you’re coming.
No maybes. “I think the hardest thing for any host is a question mark on a guest list,” Senning says. “I’m not a big fan of the ‘maybe.’”
Hosts should ping nonresponders. “If you’re hosting the party and haven’t heard back from people, it’s OK to do a follow-up and ask — without being accusatory — if they’re coming.”
Etiquette Rules: Gift Giving, Thank-you Notes
by Christina Ianzito,