Best Trade Solution

DEAR ALL,
after a long discussion without result with an insurance broker about how to sign an insurance document according UCP 600 your expertise is needed.

Leading Insurance Co:
ABC Limited
DEF AG

Insurance broker signed as follows:
For and on behalf of all
insurance companies participating
- XXX Co.-

Does the above mentioned suffice? From my point of view function (by proxy/as agent) is not mentioned.
Many thanks in advance.

Hi Pal,

I think so, we are in presence of a co-insurance, please see ISBP 745 K7.

Other comments appreciated
Ciao