调价通知函是商业活动中常用的一种函件，用于通知客户或合作伙伴商品价格的变动。以下是调价通知函范本英文的示例：

Dear Valued Customer,

We are writing to inform you that, effective from [date], the price of our [product/service] will be increasing. This price adjustment is necessary due to [reasons for the price increase, such as rising production costs or inflation].

We understand that price changes can be inconvenient, but we assure you that we have done our best to keep the increase as minimal as possible while still maintaining the quality of our products/services. We value your business and hope that you will continue to choose us as your preferred supplier.

Enclosed with this letter is a revised price list. Please take note of the new prices and ensure that your records are updated accordingly. If you have any questions or concerns regarding this price adjustment, please do not hesitate to contact us.

Thank you for your understanding and continued support.

Sincerely,

[Your Name]

[Your Company]