Currency conversion on the invoice?

When setting invoice number like {$year}{$counter} I’ve got an erro that my invoice number was already set and the email can’t be sent, even if I don’t have this number in my company. Can this be a conflict with other accounts?

When setting LA{$year}{$counter} - is working.

Maybe there’s a deleted invoice with the number?

Now the error doesn’t repeat, it appears just under invoice #… and doesn’t give me the send email email screen… and yes, now the error is: The Invoice Number has already been taken.

I don’t know why if the number was taken I didn’t get the next number.

Maybe try incrementing the counter on /settings/invoice_settings

Can I create an auto-billing/recurring invoice with zapier or with invoice ninja API ?

It’s possible with our API but not with Zapier.