We show that the blue and UV excess emission at the first few days of some
type Ia supernovae (SNe Ia) can be accounted for in the double degenerate (DD)
scenario by the collision of the SN ejecta with circumstellar matter that was
blown by the accretion disk formed during the merger process of the two white
dwarfs (WDs). We assume that in cases of excess early light the disk blows the
circumstellar matter, that we term disk-originated matter (DOM), hours to days
before explosion. To perform our analysis we first provide a model-based
definition for early excess light, replacing the definition of excess light
relative to a power-law fit to the rising luminosity. We then examine the light
curves of the SNe Ia iPTF14atg and SN 2012cg, and find that the collision of
the ejecta with a DOM in the frame of the DD scenario can account for their
early excess emission. Thus, early excess light does not necessarily imply the
presence of a stellar companion in the frame of the single-degenerate scenario.
Our findings further increase the variety of phenomena that the DD scenario can
account for, and emphasize the need to consider all different SN Ia scenarios
when interpreting observations.