Buying a home is a great investment. It's also a big step for couples whether they're married or planning to live together. It can often put a strain on the relationship, especially if both partners are contributing to the costs of the home but aren't sharing equally in the investment. If you're contributing to the down payment or mortgage payment, make sure your name is on the deed, even if it means paying a slightly higher rate. A slightly higher payment now could prevent some big problems down the road, advises CNBC personal finance expert Carmen Wong Ulrich. Watch the video to learn why.

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