Sygnum and Debifi launch multisig Bitcoin loan at a regulated bank

Key points

• MultiSYG uses a 3-of-5 multisig, with keys split between the borrower, Sygnum and undisclosed institutional keyholders.
• The maximum loan-to-value ratio is 65%, and collateral sits in a dedicated wallet per client.
• The product was announced a year ago and slated to debut in the first half of 2026; it was advertised but not yet available at the time of writing.

Sygnum and Debifi have launched a multisig Bitcoin loan product called MultiSYG, which the partners say appears to be the first of its kind from a regulated bank. The Swiss digital asset bank and the Latvian lending platform announced the product a year ago and had slated it to debut in the first half of 2026.

Under the setup, a borrower's collateral sits in a dedicated multisig wallet, with keys split between the client, Sygnum and undisclosed independent institutional keyholders. Sygnum told Bitcoin.com News the arrangement uses a 3-of-5 multisig, so at least three signatures are needed to move funds, and a borrower holds one key. The maximum loan-to-value ratio is 65%.

Clients can check that collateral remains where it should be, and independent keyholders could help restore access if needed.

Other Bitcoin-backed lenders, including Unchained and BTCBacked, already offer multisig protection with a simpler 2-of-3 quorum, while Firefish uses 3-of-3 setups with two keys held by programmes called oracles. Debifi's Max Kei said the past year, which brought incidents involving Coldcard and Ledger hardware wallets, showed why borrowers should not have to trust a custodian blindly.

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