Funny you should mention the Post Office, Willi. I strongly suspect that this lowly government agency is also participating, whether it wants to or not, in the collection of data on civilians, to be used by the federal government, against the general population, should the need arise.
Why do I say this, you ask? I'll tell you. I wanted to let the P.O. know that I want them to hold my mail, when I go out of town next month. I thought I could save myself the trip by going on-line. Their on-line form actually 'requires' that you provide them with your phone number and your e-mail address!
Then, in their Privacy Notice, they announce that they will disclose your information "pursuant to a federal court order" or "to a government law enforcement agency in accordance with the law." After all the talk about NSA and the CIA and spying on people, I opted to go to the post office, instead. The form that they had available, "Authorization to Hold Mail," requires no such information!!
Uploaded at myowndesk.top
They do that to ensure that you are actually that person and not some random other person trying to intercept their mail.
If you input those and continue, it likely would have gone to a pay screen where you enter your credit card info and they charge you a dollar.
I recently had to do address changes and I really didn't want to be charged a dollar for it but couldn't find the form at the post office. I looked a little harder and discovered that there was an option if you did not have an email address and/or a credit card, you could print the form out and mail it to/drop it off at your local post office.
For free. No email address required.