Postmark Dates Due dates are measured by the postmark on the submitted reports. In the CEI manual, due dates are listed for each category. If the 15th of the month falls on a Sunday or holiday, then the 16th, being a Monday or the day after a holiday, will be accepted. If the 15th of the month falls on a Saturday, the postmark of the 15th is enforced. There will be no extension granted.
Post offices are very busy most of the time.
Be sure that you do not wait until the last minute to mail in your reports and forms. If you have to wait to the last minute, ask to see the post office stamp the envelope with the correct date. Helpful Hints Be sure that you keep copies of all reports submitted for points. Mail your CEI points weekly if you can. You do not need to wait until the due date to submit reports.