If I were an electronic payment to a company in California and of the later mark is in the due date, the law is late?

I live in California, the company is in Illinois. I sent them a payment of 16 May, the project was due on May 17, is credited to my account on May 18. I was given a late charge, since they assert that the payment was late. It is my belief that according to California law, if payment is post marked on or before the date when the topic is, the subject is considered paid on that date. And because the company conducts business in California, I also think it would be subject to this law. The company is an institution financial services, but not a bank. The company name is Unicorn Financial dealing with the financing of dentistry and optical services, and to apply through of the offices where these services are preformed. This was my last payment. Am I right?

Yes, according to the Uniform Commercial Code, a postmark dated on or before the payment due date is considered paid in time. This is not just in California. All states have adopted the Uniform Commercial Code. However, while this works in most commercial transactions such as paying a mortgage, or an invoice, is not applied by companies, such as companies credit card. Agreements with credit card companies say the payment must be received by the due date. The financial services company to which sent your payment gets thousands of checks daily, your mail can be opened by a machine, and can not take the time to look at the postmark on the envelope. If you is paying a bill the credit card, you probably have no recourse. If you paid a bill for a product or service that indicates the expiration date, may you're right, but you may not have much luck convincing. Obviously, you did not pay the service provider or product, but a collection service. If the payment was a single bill, you can try calling the company and explain that you paid over time based on the postmark and ask to remove the late fee. They can be willing to cooperate. In today's world, it is best not to rely on the law but to make payment in advance to avoid late fees.

TOO MUCH MOTHER IN LAW