.
Your check was most likely targeted because it was for a small amount which means the thief had fewer characters to bleach out.
1) Use a check-writing pen that is resistant to check washing.
2) Use up all of the writing space on the check either with characters or squiggly lines, like this...
[Linked Image from kkytbs.org]
Better yet, use a credit card with automatic alerts activated any time the card is used for another layer of security.


B L M - Bureau of Land Management