if your registrar supports it you can give it api access and it will create the txt entry and delete it after as part of the renewal. look up acme.sh and you can see if it supports your registrar.
After a lot of fannying about - I now have it all set up.
I'm using certbot, so acme.sh confused me for a bit, until I found an authenticator script that played nicely with my host & with certbot.
@NotThamesWater started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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if your registrar supports it you can give it api access and it will create the txt entry and delete it after as part of the renewal. look up acme.sh and you can see if it supports your registrar.