Is Is Safe To Give The Financial Aid Office My Bank Account Information To Make A Direct Deposit?

Hi,
I am a full-time college student. I’ve been getting financial aid for the last two years but it wasn’t until recently I discovered that my college Financial Aid office offers a direct deposit service that, instead of sending me checks, they automatically deposit the amount of my financial aid checks into my bank account.
Now, as much as I love the idea, I’m afraid that someone at the Financial Aid office might use my bank account information to make purchases online and pay bills since the office is asking for a voided check which clearly shows my bank account and routing number…
Is my fear justified, or should I just go ahead and sign up for that service?