When you receive a VIP Pass as a gift from another player, the month/three months of VIP membership will automatically be added to your account after reading the Inbox message.
You can check how long the VIP membership will last by checking your Account Settings. Click Vegas World in the upper left corner of the screen, then click Settings from the menu.
The Settings screen opens up to the Account Settings, and you can view the expiration date from there.
If you haven't read the Inbox message, the VIP Pass will appear in the Misc section of your outfit items. Follow the steps below on how to manually activate the VIP Pass:
1. Click on Vegas World in the upper left corner of the screen.
2. Click on My Profile.
3. Click the Outfits tab at the top of the Profile.
4. Click the Items tab, and then on the Misc option.
5. Locate the VIP Pass and click on it, then click Use Pass.
You'll then see your VIP information updated in the Account Settings.