Why was my completed mission not accepted?

Several reasons can lead you to a mission refusal :

The objectives of the mission were not reached
The community didn’t accept it (Not enough upvote from the community members)
It contains offensive or abusive language
You have to be the owner of a mission to be able to complete it
You have to use the same email address on your profile when you complete a mission in order to validate it

If you need more information about a refusal, do not hesitate to ask your guild or your Guild Master on the Discord community