Tbh it's unclear, to me anyway, and although it doesn't mention Moldova specifically, it's advising downloading the PDF / Paper version again, post 1/11/21 - I just thought I'd post the link for info
The Covid Pass can be shown electronically, sent via email and printed, or as PDF and printed from the NHS App is how I understand it - I've cut and pasted the closing points of the article below
As an aside, I didn't realise Austrian Airlines only let you travel if you have the FFP2 type masks until I read it (By accident) the other day - My order arrived today, but it does make me wonder what else I'm potentially missing in order to see a football match
First and last until this calms down and becomes clearer for me I think
The copy-and-paste advice from the FCDO for all affected destinations states: “If you are travelling with a printed PDF proof of vaccination status, it must date from 1 November to ensure that the certificate can be scanned successfully.”
It is not clear if the QR code problem also applies to the paper version of the Covid Pass which can be ordered by calling 119. The FCDO has issued no advice to this effect.