Still, signature challenges come as a surprise to many voters, including Lisandra Valencia, 39. She received her first signature mismatch notice in November. She is not sure why, although she admits it is possible her signature has evolved over the past 20 years. Experts say this is common.
“Signature instability” refers to the propensity for signatures to change over time and across contexts.
Signatures might change rapidly among the youngest voters, and more gradually among older voters, according to the Washington State Patrol, which provides the required forensic training on signature matching for elections staff. Signature instability also affects voters with disabilities.
Here is how the Washington State
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