No.
not as long as you keep your original Master Image (MI) safe - the best place is an encrypted drive, do not send it by email !
print your edition and then delete the MI - that gives you peace of mind.
it can not be forged because the image is very fine - a uniform 5% grey DCNote would have about 350 000 tiny dots - about the same as the number of people in Iceland - it can not be copied by analogue means (photographing or scanning).
also because each DCNote can be verified against our public Log - that also shows its original Proposal - you do that on:
›DeepCheque.Org/Recognize
however - you can still add additional layers of protection - a signature or a stamp ?