Deposit into another's II account

I’m new here and reading everything I can to understand this Timeshare thing. I now own my deceased parents Marriott Grand Vista, and the first question I have is about their Interval International account. Since I can’t transfer their II account into my name, I would like to deposit my lock off into their (still active) account and then use the 'guest' option when I exchange. I know I can open a new account, but I was trying to use the remaining years that my parents paid for. Is this something I can do or is there some sort of cross check between Marriott and II. Thank you for any insight you can give.

There is definitely a cross check with all deposits but especially with Marriott. That said, it might be possible if the last names are the same. I personally hope it's an impossibility because it would mean a renter could deposit an owner's unit into their II account. That shouldn't be possible.

At least you inherited a timeshare of value. Most inherited stories are of units worth less than zero.

I think your best option would be to inform Interval that your parents are deceased and see if you send proof, if they can mail you a check for the prorated remaining time on their membership.