Being a decades-long resident of and voter in California, I can say with confidence that both 2020's mail-in/drop-off ballots and previous years' ballots had to be signed by the one voting and there was a warning that the signature had to match the signature on the voter's original registration.
Please make claims like, "Yes, the same Democrats who refused to allow signature verification for the mail in ballots for the November 2020 election ...," more carefully.
Been meaning to post a link to this:
This is a major election year. Unfortunately, our two major political parties — Democratic and Republican — continue to disagree on some of the rules that apply to the administration of our elections. This divide is perhaps most contentious when the issue becomes one of whether voters should present photo identification to vote.
Twenty-seven states require or request some form of ID to vote. Supporters of this policy argue that if voters identify themselves before voting, election fraud will be reduced. Opponents of an ID requirement fear it will disenfranchise voters, especially the poor, members of minority groups and the elderly, who are less likely than other voters to have suitable identification. The debate is polarized because most of the proponents are Republicans and most of the opponents are Democrats.
In 2005, we led a bipartisan Commission on Federal Election Reform and concluded that both parties' concerns were legitimate — a free and fair election requires both ballot security and full access to voting. We offered a proposal to bridge the partisan divide by suggesting a uniform voter photo ID, based on the federal Real ID Act of 2005, to be phased in over five years. To help with the transition, states would provide free voter photo ID cards for eligible citizens; mobile units would be sent out to provide the IDs and register voters. (Of the 21 members of the commission, only three dissented on the requirement for an ID.)
No state has yet accepted our proposal. What's more, when it comes to ID laws, confusion reigns. The laws on the books, mainly backed by Republicans, have not made it easy enough for voters to acquire an ID. At the same time, Democrats have tended to try to block voter ID legislation outright instead of seeking to revise that legislation to promote accessibility. When lower courts have considered challenges to state laws on the question of access, their decisions have not been consistent. And in too many instances, individual judges have appeared to vote along partisan lines.
Who might you ask wrote this?
The Reverend Doctor Jimmy Carter and James A. Baker III.
https://www.cartercenter.org/news/editorials_speeches/voter_id.html