Do not report the proceeds of a Wells Fargo CPI settlement on your tax return.
The nature of the Wells Fargo CPI payments depends on the reason you received a settlement. In many (most?) cases, they were refunds of non-deductible fees or insurance premiums charged by Wells Fargo. Refunds of such payments would not be taxable,
If the check you received was potentially taxable, Wells Fargo would have issued a Form 1099-MISC.
