Eliminate duplicate customer records
You need to be able to tell Sam Smith from Samantha Smith, from misspelled Sam Smithe. Are they all one person? Should they have one consolidated record in your loyalty program? Consider a fuzzy matching deduplication process either on the front or back end to get to one golden record.
Improve contact data quality
The best loyalty programs will not be successful if you cannot contact the member. Some verification checks to think about running: Address validation and standardization, Email validation, and Phone validation
Gain deeper customer insight
Now that you know you have the correct member and their contact information is verified, what else can you learn in order to make your loyalty offers relevant to them? Tapping into 3rd party data can help you understand your customers demographics, how they like to be sold to, and what motivates them as a consumer, allowing you to give them targeted offers and understand them on a more granular level.