1. Email sent to a mailing list, with scanned invitation attached
2. Email sent to a number of individual email ids, all on BCC. Addressed to “Dear All” or some such thing. Scanned invitation attached
3. Email sent to you only. Starts off with a “Dear Karthik, trust you are doing great.” blah blah. Scanned invitation attached
4. Email sent to you only. Starts off with a “Dear Karthik, trust you are doing great.” blah blah. Scanned invitation attached. Then the person checks on IM if you’ve received it and asks you to come.
5. Email sent to you only. Starts off with a “Dear Karthik, trust you are doing great.” blah blah. Scanned invitation attached. This is followed by a phone call.
6. Email or phone asking for your address. Physical card arrives by snail mail. You get a follow-up call.
7. You meet in some random place (such as a train or at work) and the person physically hands you the card.
8. The person comes to your home and hands over the card to you
Tell me if i’ve missed something. There’s a reason I’ve used integers for the numbering. There is an infinite number of real numbers between each pair of integers in order to fit in more levels.
You don’t have to use integers to meet your criterion. Even rational numbers or real numbers themselves have an infinite number of real numbers between any two.
Personally, I hate the phrase ‘please consider this a personal invitation’. What’s that supposed to mean?
Also, I think there needs to be a mention somewhere in your list for invitations that are out-of-town without any mention of travel/staying arrangements. As they put it in Seinfeld, those are nonvites. Or unvitations.