Duke & Henry, Ltd. is your local Maryland collection agency. When you choose to use a Frederick, MD based collection agency you are making the choice to keep your companys hard earned dollars in Maryland. A Maryland collection agency keeps money circulating locally, benefiting the local economy and bringing more new customers to your door.As a Maryland collection agency we provide far superior results to those out of town agencies and are as invested in your local community as you are.Dont send your business to an out of state collection agency when you can do business here locally with a Maryland collection agency.