Opinion - Thank You Appropriate?

[BballRookie]

Curious what the thoughts are from guys who have assigned before or been around the block:

Is it appropriate for an official to send a thank you card, or a thank you card with some candy, or a thank you card with a gift certificate (say 20 bucks) to their assigner at the conclusion of the season?

I have three assigners, one whom I've never met in person.

A little background: There is a very fine line between being cordial, and being an obnoxious suck-up, understandable. In general, I feel like I do a good job of not annoying people. In my real job, we send small gifts routinely to other professionals when they have referred us business. An example would be when an accountant has introduced us to a business owner.

People like thank you's and gifts, but there is a time and place for everything.