A 'With Compliments' slip is handy for those occasions when you want to add a quick note, and don't require a letterhead. They serve a couple of marketing purposes...
- It's a way to say thank you (conveying social benefit)
- It's a way to reinforce your brand and company name
- It's a medium to which you can add a marketing offer
This must be constructed as a proper offer. It should be compelling, and direct people to a special landing page on your web site set up for the purpose. In particular, you want to know how many visitors the 'With Compliments' slip has generated.
Assuming you do this right, you'll find your business stationary can pay for itself (or even generate a profit).