Was invalidating stamps considered under 1970 Postal Reorganization Act?

The Postal Reorganization Act of 1970 changed the name of the United States Post Office Department and more. But there were things it didn’t change — despite rumors to the contrary.

Postage stamps and postal history of the United States - Wikipedia

Postage stamps and postal history of the United States - Wikipedia

Supreme Court Stamps

U.S. Postal Service Act of 1792 – A Stamp A Day

Postage stamps and postal history of the United States - Wikiwand

Collective Bargaining Agreement, APWU/USPS Nov. 21, 2000-Nov

Invalid postage on domestic U.S. mail from 1954 to the present

Mail - The Free Speech Center

2023-06 American Philatelist by APSstamps - Issuu

Conversations with Alice Paul: Woman Suffrage and the Equal Rights Amendment.

Greetings! from Kimberly Shaw: My Two Cents

Stamp Announcement 16-14: Repeal of the Stamp Act Stamp

Postage Logo - LogoDix

The Book of the States, 2005