This is not currently part of the peer-reviewed material of the project. Do not cite as a research publication.
If the verse is part of the narrative, i.e. uttered by one of the dramatis personæ as part of the action, and introduced with a phrase such as Þá kvað Kormákr, it will be taken as a lausavísa. Although some verses ‘staged’ in this way by prose writers may originally have belonged to extended poems, these will be printed in the lausavísa category, but doubts expressed in the Notes, preferably with reference to published discussions (by the editor or others).
Such an expression of doubt would come best in the Introduction to a set of verses from the same source, since by definition it is likely that more than one verse would be involved.