Because you are left to wonder if you have a check that got into the wrong hands. That is why people cancel checks. Check theft, check washing, etc.
If people don't cancel checks, then each month you have to go back a subtract that amount, wading through old check registers looking for the right one, etc. It's an irritant, even if you know it's sitting on their dining room table. Your register won't balance until it is cashed.
Every month when I balance my checkbook I have outstanding checks, the most recently written. I notice the second month when I have to go back pages and pages or even dig out my old register to find the missing entry.
I'm still guessing those who don't care at all don't "balance" their checkbooks.
If people don't cancel checks, then each month you have to go back a subtract that amount, wading through old check registers looking for the right one, etc. It's an irritant, even if you know it's sitting on their dining room table. Your register won't balance until it is cashed.
Every month when I balance my checkbook I have outstanding checks, the most recently written. I notice the second month when I have to go back pages and pages or even dig out my old register to find the missing entry.
I'm still guessing those who don't care at all don't "balance" their checkbooks.