error message: invoice has already been paid

[rhinebeckmusic]

I have two customers who buy the same service on my website. They have both told me they receive an error message that tells them the invoice has already been paid. I realize this may be a setting on my end that isn’t allowing the invoice number to change. I can’t figure out where that is though or how to change it. Can anyone help me? Thanks. 

I also got this from one of them. 

Password reset

This email is being sent to you because you requested to reset the password for account

We don’t have passwords for people’s accounts. I’m not sure why he was sent this? Thanks for any help. Erin

[PayPal_AshleyM]

Hi rhinebeckmusic,

Thanks for providing great details. Based on what you've said, it sounds like the best option for you would be to use recurring payments for your buyers. I hope this information helps!

- Ashley M