Sygnum Announces Bitcoin-Backed Loan With Multi-Signature Wallets

Sygnum and Debifi announced MultiSYG, a Bitcoin-backed loan for Sygnum customers that puts pledged Bitcoin in a dedicated wallet governed by multiple keys.

Control is divided among the borrower, Sygnum and independent institutional keyholders. Bitcoin script applies the wallet’s transaction approval rules. The Oct. 23 announcement did not specify the signing threshold, leaving the number of approvals required for a transaction unstated.

An October 2025 plan for the product targeted the first half of 2026 and described a three-of-five signing arrangement. The new announcement did not confirm whether that threshold remains in place.

Spending funds from a multisignature wallet requires approval from more than one key. Other Bitcoin lenders use different setups: Unchained’s loan collateral wallet uses two of three keys, while Firefish uses a three-of-three escrow involving a borrower and two oracles. The current MultiSYG announcement identifies the groups holding keys but does not say how many must approve a transaction.

More than one in five Sygnum clients has a Lombard loan. Bitcoin accounted for more than 80% of pledged collateral volume, up from 63% in 2023. The announcement did not disclose how many customers have borrowed through MultiSYG.

Sygnum Bank AG is listed as a bank in Zurich by the Swiss Financial Market Supervisory Authority (FINMA), Switzerland’s financial regulator.

The Oct. 23 announcement did not specify interest rates, loan maturities, minimum loan size, when applications would open or eligibility for U.S. customers.

“Adding distributed, multi-signature security is a natural next step,” said Iulian Zanoaga, Sygnum’s deputy head of credit and lending.