Below are rules from HARRIS County (TX) and Fort Bend County (TX) for dropping off mail-in ballots in person . They’re NOT what I expected.

ADDENDUM for Fort Bend at bottom: Aug. 20, 2020:

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HARRIS COUNTRY: See below the rules for hand delivering your voted ballot.
Hand Delivered, in-person by the Voter to the Early Voting Clerk’s office.
For the November 3, 2020 general election, the hand-delivery period has been extended.

You may deliver your own personal ballot to the Early Voting Clerk’s Office during regular business hours any time after you receive and mark it.

Please contact your local Early Voting Clerk’s Office at the phone number listed at the bottom of this notice if you have questions about their hours of operation.

You may also hand-deliver your own personal ballot to the Early Voting Clerk’s Office on Election Day between the hours of 7:00 a.m. and 7:00 p.m.

You may only hand-deliver your own Carrier Envelope and not the Carrier Envelope for another individual. You will be asked to present an acceptable form of photo ID listed in Section 63.0101(a) of the Texas Election Code.

If you do not possess and cannot reasonably obtain an acceptable form of photo ID, you can execute a Reasonable Impediment Declaration and provide a supporting form of identification listed in Section 63.0101(b) of the Texas Election Code. Also, if you have a Voter Registration Certificate containing the Disability Exemption (E) notation, you may present it.

You will be asked to sign a signature roster.

Here is the addresses of our main office and annexes: http://cclerk.hctx.net/ContactUs.aspx .

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For Fort Bend County, I got this response to your inquiry:

Mike,

You can deliver it to 4520 Reading Road Suite A-400 in Rosenberg. If you do deliver, you must show a photo ID and you can only return your ballot.

John Oldham
Elections Administrator
4520 Reading Road
Rosenberg, TX 77471
(281) 341-8670
281-341-4418_fax