Enable sharing of single document

I needed the help of your support to realize that this feature doesn’t exist: from time to time, I need to share a document with a third party, juste “FYI”. Asking them to create an account is not reasonable for this usage.
I could download the document, then send it per email, but I don’t like to send documents per email (that’s not very GDPR compliant as it will stay there for an eternity).
So instead I would download it, place it on a OneDrive or Dropbox, then share the file using limited duration.
But it would be so convenient to just share the document from sparkReceipt !

Bonus: I could imagine here a win/win opportunity for Sparkreceipt :
provide a form to send an email with a link to the document, and include a footer link to explain the value of Sparkreceipt and invite them for a trial
Would be a way to fund the additional cost of this feature ;-)