RE: How to respond if a client asks you to lie
I think you have the scale of the lie backwards.
#1) This is giving a good impression - no different than wearing your best suit or making a glossy brochure for the presentation. However it is probably counterproductive to emphasize size of company since that is easy to check. Emphasize the amount of effort you can do on the project.
#2) I'm missing something here - why would the vendor care who made the call for support the client had paid for. If necessary have the registered user make the call and just use a speakerphone.
#3) There is no grey area here - the client is trying to defraud the IRS. The only question is whether you report them or not.
