Not because of flashy design or clever copy, but because of context. A rebate feels earned. A check feels tangible. And when someone has already done business with you, that combination instantly lowers resistance.

Current customers don’t have to “decide” if they trust you. They already do.

That’s why Spark Checks are so effective for customer retention and reactivation. You’re not introducing yourself. You’re simply giving people a reason to come back now, instead of later, or not at all.

And because the cost per piece is so low, the math works quickly. One or two redemptions often cover the cost of an entire mailing.