The short answer
Start with the guide for your problem
Most MultiBit problems are solved by following the right steps. Choose the situation that matches yours:
Help & Support
MultiBit was discontinued in 2017 and has no official support — but a problem with the app alone does not mean the bitcoin has been lost. Start with the free guide for your problem, and verify against known wallet evidence before drawing conclusions.
The short answer
Most MultiBit problems are solved by following the right steps. Choose the situation that matches yours:
MultiBit Classic (2011–2017) stores individual private keys in .wallet and .key files — there is no seed phrase. The common problems are a forgotten password, a wallet that won't open, and a balance that looks wrong. The MultiBit Classic guide explains where the files live and how to export your keys.
MultiBit HD (2014–2017) is backed by a 12-, 18- or 24-word seed phrase and stores data in an mbhd.wallet.aes file. Because the seed is the real key to your bitcoin, an HD wallet can usually be restored in a modern wallet like Electrum even without the app. See the MultiBit HD guide and the seed restore guide.
If the free guides don't cover your situation, the contact page lists further options for help.
The same cryptographic limits apply to everyone — no one can bypass a strong password. If the free guides don't cover your situation, a legitimate professional recovery service can help. MultiBit Online is owned and published by Crypto Recovers.
A word of caution: no one can honestly guarantee that a wallet can be recovered — treat any promise of a 100% guaranteed recovery with suspicion.