My aunt received a check from the life insurance company after the passing of her lifetime partner. She wants me to deposit and cash it for her. What repercussions could there be? Will the insurance company come after me? Will I have to pay taxes on it? What should I watch out for or should I just not even touch it?

So she wants it deposited into HER account, or YOUR account?

You're not being clear, because next you are saying "cash it". So what exactly are you doing, I don't understand.

Yes, she would have to endorse it first. And probably be with you when you go to the bank.

You have to make sure she properly endorses it. Prolly need her to go with you actually. Depending on what bank it is, they dont really let you walk in and cash a check thats not yours.

You cannot cash a cheque for someone else.

For some reason, your aunt is trying to hide the money. Do not touch it.