Only government creditors are allowed to attach social security benefits. In some rare instances, state courts have been able to take social security money if this income is mixed with money from other sources. So for instance, say I got $1K/month for social security & it is deposited checking account. But I also deposit my gambling winnings of $200 into this account, or deposit the $50 rebate check I got from the power company for insulating my windows into the account. What amount of money in the account is protected & what isn't? That can be a problem known as co-mingling.
In any event, until grandpa is sued, he doesn't have to worry about this issue. I just thought you should know. Hope this perspective helps
Ms. Bunce is correct that the benefits themselves are exempt from garnishment by general unsecured creditors, but once deposited in a bank account that exemption might be easily lost. Banks do have an obligation under current regulations to immediately investigate the source of funds when an account is frozen pursuant the attachment, and if it is all Social Security the funds must be promptly released. The problem is the possibility of dishonored checks and large banks fees during that process.
Best wishes for a favorable outcome, and please remember to designate a best answer.
This answer is offered as a public service for general information only and may not be relied upon as legal advice.