Anthere wrote: SSN = Social Security Number Used as an identifying number for US citizens (and legal residents) in a lot of settings, especially financial. Knowledge of someone's number has great potential to allow identity theft, so should not be published under any circumstances. EIN = Employer Identification Number Assigned mostly to corporations for tax purposes. Not used for as many other things as an SSN, so there's a lot less potential for misuse. One use of interest to us is that if a company has a charitable giving program in which employees can have an amount withheld from their paychecks to the charity of their choice, the company would need the charity's EIN. I'm not aware of any serious problem for a nonprofit publishing this number (the American Red Cross publishes theirs on their website). In fact, I've suggested putting ours out there in order to make it easier for companies to add us to gift-matching programs, but I'm not aware that this has been done yet. --Michael Snow

One use of interest to us is that if a company has a charitable giving program in which employees can have an amount withheld from their paychecks to the charity of their choice, the company would need the charity's EIN. I'm not aware of any serious problem for a nonprofit publishing this number (the American Red Cross publishes theirs on their website). In fact, I've suggested putting ours out there in order to make it easier for companies to add us to gift-matching programs, but I'm not aware that this has been done yet.