So I get a contract back a few days ago from a 2 year customer. Payment grace period for her is 10 days for services performed month prior. So I am already 40 days out before it is late. Last year she was good for the first few, then a little later, then "it fell behind the desk" 60+ days, then december came and no check, "sorry the holidays were tight" 50" TV box on the curb. Her final payment was 90 days from date of service. She took it upon herself to cross off my payment terms clause and write in: "We pay 30 days from date received. We get paid every 30, you get paid every 30." I found this a little upsetting, mostly because I feel I could have at least received a phone call about the matter. So basically according to her I will see money 60-75 days after service. I have been mulling over the pending call, just not sure which approach to take. Opinions are welcome. I'm leaning toward payment a month in advance, credited toward final invoice.