Out-of-stater here, curious about GA politics.

Is your Secretary of State Brad Raffensperger warning registered voters they're about to be purged
from the voting rolls because he's legally required, or is he giving them a heads up because he's
weak and virtue signalling?  

https://www.northwestgeorgianews.com/rome/news/local/raffensperger-launches-new-purge-of-georgia-voter-rolls/article_21a792ba-d05e-11eb-ade0-e70b567942f8.html

My opinion is that he's trying to salvage his political career. He stepped on his dick big time with Ga conservatives and I believe he's finished here.
For me, it doesn't matter what he does now. He has lost my vote and I imagine there are alot of other folks here that feel the same way as I do.

The Secretary of State is nominally in charge of elections, but the real power is with the local election officials.  The office does not hold the power to simply overturn elections or many of the other things that were, and continue to be, demanded of it.  

As to the purge, that is a requirement under state law.

This.
I’ll be voting against him in the primary.

You are correct. However, running radio ads claiming how secure this election was and how everything was absolutely legit was a major mistake. After seeing the videos and reading the reports for myself I have come to the conclusion that he was at worst involved or at best didn't care. There is nothing him or Kemp can do to change my opinion of them.

@Extorris
Me too.
And Kemp. He should have been saying that he had concerns about the election and trying to get to the truth instead of hiding and saying nothing.

I suspect Raffenspooge and Kemp will be on Dominion's board of directors after the next election cycle for each.

I suspect these are the last republicans to hold their office for many years. Georgia was for years a democrat controlled state. These 2 have probably sealed the deal on flipping the state to the democrats

"Democrats" in the South used to be Conservative. The parties have effectively switched over the last 20 years or so.

Without any comment on any public official in particular; the answer to your question is:  Yes, the Georgia Secretary of State is legally required to purge the voting list of stale voters and to send them a letter before doing so.  If they respond; then they remain on the voting list.

HERE IS A LINKY to O.C.G.A. § 21-2-234.  I'll post a copy of it below and highlight the relevant portions.

2019 Georgia Code
Title 21 - Elections
Chapter 2 - Elections and Primaries Generally
Article 6 - Registration of Voters
§ 21-2-234.
Electors who have failed to vote and with whom there has been no contact in three years; confirmation notice requirements and procedure; time for completion of list maintenance activities
Universal Citation: GA Code § 21-2-234 (2019)

(a)(1) As used in this Code section and Code Section 21-2-235, the term "no contact" shall mean that the elector has not filed an updated voter registration card, has not filed a change of name or address, has not signed a petition which is required by law to be verified by the election superintendent of a county or municipality or the Secretary of State, has not signed a voter's certificate, has not submitted an absentee ballot application or voted an absentee ballot, and has not confirmed the elector's continuation at the same address during the preceding five calendar years.

(2) In the first six months of each odd-numbered year, the Secretary of State shall identify all electors whose names appear on the list of electors with whom there has been no contact during the preceding five calendar years and who were not identified as changing addresses under Code Section 21-2-233. The confirmation notice described in this Code section shall be sent to each such elector during each odd-numbered year. Such notices shall be sent by forwardable, first-class mail.

(b) When mailings to electors whose names appear on the list of electors, including, but not limited to, acknowledgments under Code Section 21-2-226, are returned undeliverable by the United States Postal Service, the confirmation notice described in this Code section shall be sent to such electors.

(c) The confirmation notice shall be a postage prepaid, preaddressed return card on which an elector may state such elector's current address and which also includes a notice which states substantially the following:

(1) If the elector has not changed addresses or has changed addresses within the county or municipality in which the elector is currently registered, the elector must return the card with the updated information, if any, within 30 days after the date of the notice; and

(2) If the card is not returned within 30 days after the date of the notice, the elector's name shall be transferred to the inactive list of electors provided for in Code Section 21-2-235.

(d) If the elector returns the card and shows that he or she has changed residence to a place outside of the State of Georgia, the elector's name shall be removed from the appropriate list of electors. If the elector confirms his or her change of address to an address outside of the boundaries of the county or municipality in which the elector is currently registered, but still within the State of Georgia, the elector's registration shall be transferred to the new county or municipality. The Secretary of State or the registrars shall forward the confirmation card to the registrars of the county in which the elector's new address is located, and the registrars of the county of the new address shall update the voter registration list to reflect the change of address.

(e) If the elector returns the card and states that the elector has changed residences within the county or municipality in which the elector is currently registered, the elector shall remain on the list of electors, the registration records shall be corrected to reflect such new address, and a new voter identification card shall be issued pursuant to Code Section 21-2-226.

(f) If such elector returns the card and confirms that such elector continues to reside at the current address at which such elector is registered, the fact of such confirmation shall be recorded and the elector shall remain on the list of electors.

(g) If the elector fails to return the card within 30 days after the date of the notice, the elector shall be transferred to the inactive list provided for in Code Section 21-2-235.

(h) Nothing in this Code section shall prevent the removal from the list of electors of an elector for ineligibility to vote.

(i) List maintenance activities pursuant to this Code section and Code Section 21-2-233 shall be completed not later than 90 days prior to a general primary or general election for federal offices or a presidential preference primary. This subsection shall not apply to notices sent pursuant to subsection (b) of this Code section.

Bold and italicized emphasis added by me.

NOTE:  Nothing in this post should be considered legal advice.  If you consider it to be legal advice; you are sadly mistaken and hopelessly ignorant.