Question for Monday Episode

[MBantle]

Dear All,
I would like to ask Erin the following question: Is it standard that whenever entering into an agreement with a publisher or supervisor to agree on a warranty or indemnity that the work submitted is original and does not infringe upon the rights of third parties? Whilst I think we all want to submit original material there is always a slight chance that someone else on the planet wrote the same or a similar melody and we are simply not aware of it. In that scenario I think it would be rather onerous that the blame is solely on the composer as those reviewing and buying the material should also have an obligation to flag any similarities (bearing in mind they are professional publishers/screeners of music and therefore more knowledgable than the composer when it comes to 'what's out there'). Ideally, I would like to only sign up to what I know (as in my music being original 'to the best of my knowledge'). Is that negotiable?
Cheers,
Matt