Sign a contract in timely fashion. If they don’t have such an agreement, it’s up to you to make one up and get a signature.
Don’t ever leave your art anywhere, let alone agree to an entire show, without a signed piece of paper.
Provide proper art handling. If someone besides you is doing the uncrating, installation, and packing, you should be assured that they have adequate training to do the work.
Promote the event on a blog, website, and through social media. If they have their own mailing list, they should be expected to use it for your exhibition as well.
Support you through any events. Regardless of whether the venue is hosting and paying for an event, it should still be supportive of whatever you schedule. If the venue’s staff are invited to the event, they should be delightful to all of the guests and be helpful to you in any way possible.
Maintain a clean, friendly environment. You’re encouraging people to visit their space. The least they can do is sweep the floors, clean the bathroom, and greet visitors.
Ensure security. The extent to which works are insured will, again, depend on the venue. But you should expect that doors are locked, artwork is hung securely, and every precaution is taken to prevent damage or theft.
Notify you of sales. You should be notified promptly when one of your pieces sells – especially if that work needs to be replaced within the space. Not all venues will be able to share the contact information of buyers with you due to their own privacy policies, but they should have notification in place.
Pay you on time. Payment terms should be outlined in any contract. Whenever you’re notified of a sale, mark the payment due date on your calendar and start following up with the venue if it’s not received on time.
[ Make sure you read about your responsibilities to the venue and show. ]