How to re-date your mail piece using the DM300C, DM400C, and more
Learn how to correct the date on your mail piece using the DM300C, DM400C, and DM475.
If metered mail cannot be mailed on the date shown in the impression, a date correction impression must be affixed to the mail item. 
- Press Menu
- Select Printing Options
- Select Date Correction
- Select the desired option:
- Set today's Date
- Advance One Day
- Specify Days to Advance
- Date can be advanced 30 days from today's date. It cannot be be back dated beyond today's date.
- You can print on a tape or directly on the back side of the envelope.
- Printing on a tape
- Press Tape
- input the number of tapes, from 1 to 50
- Press Start
- Printing on the back side of the envelope
- Place your envelope face down on the deck
- Press Start.
- You can apply the tape beside or below the original impression as well as printed or affixed on the backside of the mail item in the upper right-hand corner as shown
UPDATED: 14 August 2021