PIERRE, S.D.(WNAX)- Some shoppers are surprised by service fees being added to their bills when they use a credit or debit card.

South Dakota Retailers Association Executive Director Nathan Sanderson says businesses have some options with fees.

Sanderson says rules are somewhat different between credit and debit cards.

Sanderson says consumers should talk to businesses or their bank if they have questions.

The Retailers Association operates a credit card clearing center.