Legal Question in Discrimination Law in United States

If it affects current or future income, assets, or anything else in the underwriting process, of course they can. It is certainly reasonable for them to consider it as a factor in most cases.

They can not base their decision on your disability. Your income which may - or may not - be reduced because of your disability would be a legitimate factor in a bank's lending decision.

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No, they would do so on lack of income and credit qualification.

Based upon your disability? No. Unless there is a compelling reason they cannot even use it as a factor.

Based upon the amount you receive for disability? Yes. The amount you received regardless of the reason why you receive it is a legitimate reason.