Customer management is a key feature for hotel operations. However, duplicate management tends to be a problem for Hotels. Duplicate happens if hotel does not have an efficient tool which identifies and eliminates the duplicate customer. THE OMOTENASHI has good duplicate management tool and it automatically eliminates duplicate when customer details are added from the internet. THE OMOTENASHI uses “Name + Postal code + Telephone” as a duplicate identifier. This will eliminate over 90 % of duplicates and has other tools which also cleans the rest. Using THE OMOTENASHI will lead to keeping of unique customers. Hotels can always get proper and accurate customer information.