For podcasts the answer is to use the show-notes feature to post the URL. For phone calls the answer is to send a text message. If you're communicating by aud

For podcasts the answer is to use the show-notes feature to post the URL. For phone calls the answer is to send a text message. If you're communicating by audio and have no textual 'side-channel' then yes things are more awkward, unless it's a simple and memorable URL (e.g. example.com).