My mother passed in December 14, 2014 she put the deed under my name but the mortgage was not notified. I've been paying on time but I'm not sure if I have to be paying it since she passed.. and when I call and make the payment I give her information ...
If it were me, I probably would just keep paying the loan.
(Hanging head with red face in shame...)
"If the deceased parent is married, the surviving spouse is typically responsible for satisfying the mortgage. When there is no spouse, the children are usually the next in line to inherit any assets. A parent can assign the property to a child in a will, entitling him to any equity in the home. Under federal law, the mortgage is allowed to remain in effect when passing to a beneficiary upon death. This means the beneficiary can continue making the mortgage payments until the loan is repaid. The child inheriting the home can also choose to sell the home and pay off the mortgage if she cannot afford to continue paying the house payment." [source: finance.zacks]
If you stop paying the mortgage, the bank will repossess the home.
Talk to an attorney.
If by "put the deed under [your] name" you mean (a) she executed either a warranty or quit claim deed to you, (b) if it was properly executed and recorded, (c) if you're now the title holder, and (d) if there was no will or trust or any provision made for selling and distributing the proceeds to any siblings or other heirs...well, then it would seem the house is yours.
However, there's likely a clause in the mortgage providing that an unauthorized transfer of title is an event of default. It was standard in commercial mortgages when I was in that field.
I think technically that you are not responsible because you didn't assume the liabilities under the mortgage, so you're not an assignee under the mortgage. That's just the legal issue as I understand it.
But as fee or title holder, you're responsible for the house.
If you don't pay the mortgage, it will go into default and be foreclosed.
Your question asks if you "can" pay on the mortgage - yes, you can. But there are other issues to be addressed as well.
And I am sorry for your loss - it must be especially hard to try to deal with the house and mortgage issues after losing your mother so recently.