When hooking up your bank account with another payment service (for instance, Paypal), the payment service typically posts a small deposit or two to your bank. After a few days (when those deposits come through), you’re expected to remember to check and input the deposit amounts to verify your account. With a potential delay of several days though, it’s easy for this to completely slip your mind.
That’s why I was delighted when Simple sent me this quick email to let me know my deposits had come through.
What small problems can you solve for your users?