Royal Mail is predicting significant disruption due to the short-term closure of multiple international routes.
Royal Mail has advised it expects significant delays to international mail services with immediate effect.
All postal services into mainland Europe and some international destinations have been suspended.
"We are advising customers not to send international parcels until the situation becomes clear. We will keep you informed of any developments."
Guernsey Post is advising islanders to hold on to any parcels bound for overseas for now.
"Most of the time now a product that is either posted to or from those areas would have been too late to arrive for Christmas, but if there was any doubt I would strongly recommend that customers don't post internationally at the moment and wait for this current issue to be resolved." - Boley Smillie, CEO of Guernsey Post.
Guernsey Post says it will keep customers informed of any developments,
Percival the Puffin released close to his Herm home
Guernsey FC Women to begin FA Cup campaign
Full deployment of Guernsey's search and rescue assets off Herm
End to fare subsidy for Sark residents needing a medical appointment
Jersey and Guernsey women's teams to make FA Cup debuts
Eventful summer Saturday in Guernsey
No decision on GST for Guernsey until the autumn
New gaming venue opening in Guernsey this summer
