Do Not Own
Hagrid was not the one to give Harry his letter, in fact he wasn't there when Harry's letter was presented to him.
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Snape knocked on the door to number four Privet Drive.
"Hello can I help you?" Petunia asked before she saw who it was, "What the hell are you doing here?"
"I've come to give Mr. Potter his letter," he told her.
"Wait here," she turned into the house, "Boy get over here."
Seconds later Harry peeked out the door, "Hello sir can I help you?"
"This Mr. Potter belongs to you," Severus handed him the letter.
Harry looked at it, "But sir this can't be my letter."
"And why not, Mr. Potter?"
"It's addressed to a Donatae Snape," Severus snatched the letter from the boy.
"There must be a mistake, this boy died years ago," Snape looked at Harry, his eyes matched his wife's. He had the exact same shade as Catrina, "Do you mind if I run a test on you?"
"No," Harry said unsure.
Snape pulled his wand out and cast a lineage spell.
"What did you just do?" Harry asked.
"A lineage spell," Snape answered.
"But magic's not real, sir," Harry said.
"Of course it is, after all I just used a spell on you," Snape told him.
"What did you do to me?" He demanded.
"I casted a lineage spell, and found out you are not a Potter but a Snape. Matter of fact my son," he whispered the last part.
Harry was confused, how was he a Snape but not a Potter, "Your my Dad?"
"Yes, now go pack your things you are not required to stay here anymore," Harry ran from the door to his cupboard and packed up his extra set of clothing and his ratted blanket.
He was back at the door a moment later, "I'm ready."
"Hold on tight," Snape offered his hand and apperated to Spinner's End.
Harry fell to the ground feeling like he had just gotten pulled through a straw.
"You'll get used to it, Harry. Sit we have to talk," Snape pointed to a dingy chair.
He sat.
"Now I will start at the beginning and try to keep it simple. I married a woman named Catrina, you have her eyes, she and I had a baby boy named Donatae. About a year after he was born Death Eaters came and tortured her to death, I am not sure if you were harmed in the incident. We will find out when we remove the glamour on you. You disappeared shortly after your mother's death. I looked everywhere for you, unaware that you had been put under a glamour. Since Harry Potter does not existed we will be calling you by Donatae to throw Dumbledore off. I have a feeling that he is behind this," Snape mumbled to himself.
"Sir what are Death Eaters and who is Dumbledore? Who am I?" Harry asked him confused.
"Death Eaters are very bad people who take pleasure in harming others. Dumbledore is the Headmaster of Hogwarts, the school you'll be attending. He is a meddling old coot, if he comes after you walk in the other direction. As for who you are, you are my son Donatae Morgan Snape. You were born on August first to your mother Catrina and I. Here is your letter," He handed Harry the letter.
After reading the letter he looked at Snape, "How am I to pay for this?"
"You won't be paying for your school things that is my job."
Snape got up from his chair and went behind the desk at the other end of the room, he grabbed a vial and returned to Harry and told him to drink.
"This potion will return you to your proper appearance," He said taking the vial back as Harry changed back into Donatae, "From here on out you will be Donatae and you can call me Father."
Donatae nodded, still feeling tingly from the potion. Snape took a proper look at him and pulled his son, his son into a hug.
Pulling back he asked, "Do you want to see what you look like?"
"Yes," Donatae blinked at his new voice as a mirror appeared scaring him. Slowing his racing heart he looked into the mirror, he looked like a mini Snape with a smaller nose and green eyes. Donatae also noticed the lack of the lighting scar.
Snape watched Donatae from a few steps away, noticing the boy's eyes drooping, "come along Donatae, you need to rest."
Donatae looked up at the unfamiliar name before nodding and standing. He would of fell if Severus had not caught him. "Don't worry its your body getting used to the old you, it will take time for you to reach your full strength," he lifted Donatae into his arms and carried the boy to his old childhood room.
He placed the already sleeping boy on the bed and brushed his hair out of his face to kiss his forehead. Even though he did not show it, he was thrilled to have his son back.