I am assuming this is a purebred? Or are you talking about licensure with your city registration?
Either way, most would say the person who is the caregiver and home of the dog. You have stated for 3 years.
Does your boyfriend have the means to take you to court for a settlement? You see these things on Judge Judy, etc. And if you have been the caregiver all that time, she would rule with you as well.
If you have taken care of the dog, done the vet visits, etc that is your proof you have paid for the dog's care, purchased the necessary food, done the shelter and love.
My house? My son in college brought home this 6 week old registered female german shorthair. I said no. So it came to she would be in her carrier unless he was home to take care of her, hold her, etc. Her carrier was carried to the front yard, she honed out her favorite spot, and she would be let out.
I was not training the dog, but the son.
MY RULES, and there were many. Already I was feeding her, her first appointments at the vet upon arrival (even tho the original family had vetted her). It went from MY RULES for HIS DOG, to MY RULES for MAMA's DOG. He moved onto campus 3 hours away, but had the summer to have his dog.
At 12 years old, she has spent only 1 week with him in all those years, outside of the first summer when he lived at home. She liked it, but she was so happy to get home to MAMA. She is a dog of MY characteristics. We know and sense each other, heart to heart.
She does not like to get in a car and travel at all. Lucky ME my vet is at the end of the block. With all the years I was with the humane society, I did not add another dog. She was my girl I never had (3 sons). She was a mama's girl. Still is.
Back to your question. I hope you have been doing licenses each year as well. This will show established ownership. On the Police Department roster, they will have you listed as her owner. Your rabies and license numbers will show you as the owner. These are pluses.
Good Luck.
Bob and Randy, their boyfriends
What Spike Lee movie finds a woman asking three boyfriends over for Thanksgiving dinner?
By the light of the silvery moon
There are three syllables in the word "improvement" (im-prove-ment).
They must be at least three inch block characters
Aqua had three days to prove that love was not a myth.
The three items that you must always have with you when driving are:Driver's LicenseRegistrationProof of InsuranceOh, and your wits and safe driving knowledge!
In england, its after three years from first registration.
insurance, registration,and also the inspection
In Alaska, three years or when the Coast Guard permit expires.
Every three years
They must be at least three inch block characters