The vendor has a policy: checks that are numbered less than 1500 are not accepted.
The clerk tells me to just ask my bank to put a higher number on my checks and send me some new ones.
The control was put in place years ago, to reduce the possibility of fraud from an outdated attack method (does anyone even commit check fraud anymore?). The vendor obviously knows the control is easy to overcome, and only actually prevents legitimate transactions.
This is not a good control.
First person to guess the vendor correctly gets a free copy, your choice, of one of my books. Put your guess in the Comments to this post.