The coupon idea is OK unless you are talking RESPA and settlement services.
Yes, special delivery methods and campaigns can have different rates so long as there is no discriminatory practice. That is, don't do a mailer to the country club members about a great deal if their membership is not representative of your customers demographics. I'd justify the offer in a business case proposal and retain it.
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AndyZ CRCM
My opinions are not necessarily my employers.
R+R-R=R+R
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell