A customer has billed us a year late do you have to pay?

Answer 1

First, this question does not make sense, at least as it was phrased.

However, for sake of providing the answer which I believe is being sought.

Since most companies and businesses bill customers, let's assume you meant; A VENDOR has billed you a year late.

It may actually depend more on the service or product that was being provided to you and the terms you previously agreed to with that Vendor. Of course this could vary greatly depending on which state you are registered with and doing business in. Also it may be dependant on what type business you have or even the service or product you are being charged for.

Most importantly, Did you request the service or product?

If this was for a product, was the product received?

Or then again maybe this was for an item that was placed on such as a back order? If so and you did not cancel the order. Or you actually already received the product, than Yes.

Now, lets say it was for a service such as Janitorial or Landscaping,or some other maintenace cost such as an added charge out of the normal or typical duties of their job. Lets say something like painting a room. Whereas the billing could have easily been a simple oversight and or perhaps it was thought to have been previously billed.

Or maybe it was billed but they have not yet received payment from you, yet is a valid charge for services requested by you and already rendered by them. Yes you need to pay the bill.

There may be a few variances which could play out more in your favor, so if you would like to rephrase the question and provide more of the pertinent information, such as location, type or your business, their business and describe the transaction, who was providing who with what. The answers may change or not, although they could be more accurate of your individual situation.