The purpose of a trademark coexistence agreement is that often marks are used by multiple enterprises in "good faith".
The absence of a formal agreement does not undermine any enterprise using the mark as they are in different global regions.
However, as the enterprises grow, overlaps can develop, and both parties can have substantial rights for using the trademark.
[2] Public interest must be considered when entering into a trademark coexistence agreement.
This often applies in situations such as if two medical companies bore the same trademark for unique products, as this could lead to confusion and have serious impacts on consumers.