Through July 20, 2016, eligible Hilton HHonors Card from American Express cardmembers can earn 10,000 bonus points for adding an authorized user to their account. This offer appears to only be available to those with the no fee version of the Hilton Amex.

To take advantage of this offer, visit this link. Once you’ve entered your info, you should see a page like this with the offer:

As per the terms, bonus points are capped at 10,000 per account, so adding more than one authorized user won’t get you more points.

Also, note that requesting an additional card will result in a hard credit pull for the authorized user. It also means that your Hilton account will then begin appearing on the authorized user’s credit report. As a consequence, if this is an old account with good history, this is one way of helping boost someone’s credit score.

Adding others to your account is not without its pitfalls. It goes without saying that you should only add people who you trust. While an authorized user can make charges on your account, you are still the only one who is legally liable for any balance.