~
The funds are for a dog rescue place in spain.
~
since it is doge related, i think you should try DogeCoin communities too.
off the top of my mind i can name reddit.com/r/Dogecoin
if you are a legit place you can make a post on reddit with all the information and some pictures and you might have some luck.
It's not a bad idea but it still goes back to need more concrete proof. I'm not sure what official document Spain uses. But posting official document showing it is a true charity will help.
But I still think so many scammers it's hard to get donations even for good causes. Just is easy to post a picture even possible fake proof. It really takes a person well trusted to track it all down and vouch. Even after though not sure how much donations you can count on.