Ladt week I went to a customer who already owed 2 lots, with last week it was 3. She normally pays by bank transfer, after I was done she calked after me to apologize for non payment, claiming she lost the last bill. She told me she was doing banking that day,and would pay then. Still waiting. I don't collect at the end of the week, as its too far out. Should I send an invoice or wait til next time and see what happens?