My mail rewards club enter unique numbers

It sounds like you're trying to enter unique numbers for your mail rewards club. Can you please provide more context or details about the specific rewards club you're referring to? This will help me better understand your question and provide a more accurate response.

For example, are you trying to enter a unique code or number for a specific promotion or offer? Or are you trying to create a unique account or login for the rewards club? Any additional information you can provide will help me assist you more effectively.