Frugalistas looking to snag a bargain on a massage or a fancy dinner at new restaurant can spend a lot of time browsing daily deal sites. While these sites provide the opportunity to try new businesses at a discounted price, shoppers need to be sure they read the fine print on their deals and understand the sites’ terms of service agreements to avoid complications when they redeem their deal vouchers.

These tips will help you better understand the daily deal sites so you can shop safely and enjoy the deals you purchase.

Check the expiration and black-out dates

Most daily deals have expiration dates. Plan accordingly so you use your voucher before the deal expires. Make sure you check for blackout dates too. Some of the popular vacation deals can only be redeemed during certain times of the year.

Do your research

Spend five or ten minutes reading reviews of the product or service you’re thinking about purchasing. If the company has a lot of bad reviews, you may want to skip the purchase, no matter how great the deal seems to be.

Understand how you can use the deal

Some deals you can use more than once until the entire amount of the deal is gone, but other coupons you have to use all at once. In general, you can’t combine a daily deal with another coupon or promotion. Read the conditions of your specific deal before you buy. If you’ve read the fine print, but still don’t understand everything, ask questions before you buy. Many of the daily deal sites have a frequently asked questions section or an area of the site where they handle questions about specific deals.

Verify which locations accept your voucher

Some deals for chains are only valid at certain stores. Check to make sure the location closest to you is one of the participating stores or else you might have to go out of your way to use the deal.

Know when your credit card will be charged

Some sites won’t charge you until after a certain number of deals have been purchased; other sites will charge you immediately or at the close of a business day. After you purchase a deal, keep an eye on your credit card statement to make sure you are charged correctly.

Check the site’s refund policy

Some sites will refund your money if you are disappointed in a deal. Others will refund your money if a merchant goes out of business before your deal’s expiration date. Some won’t refund your money at all. Make sure you understand and are comfortable with a site’s refund rules before you make a purchase.

Know whom to contact with problems

In most cases, the daily deal sites can’t help you solve problems with the company you bought the deal from. You will need to work with the company directly. If you have an issue, stay calm and state exactly what happened and how you would like the situation to be resolved. You can use the tips from the USA.gov sample complaint letter to help fix the problem.