Bitstamp is set to automatically reject crypto deposits above €1,000 when they come from third-party self-custody wallets starting Aug. 18, according to notices reproduced by customers. The reported change appears to focus on wallets owned by someone other than the Bitstamp account holder, not on customers transferring assets from their own self-custody wallets, and the notices say deposits from other exchanges will not be affected. Bitstamp has not publicly authenticated the notice, and user reports do not specify which legal entities, jurisdictions, account types or launch time are covered. The exchange's API documentation shows it can distinguish between customer-controlled and third-party wallet origins through fields and verification tools including ownership-status checks, Satoshi tests and xpub registration. Those controls were introduced in stages from March through June, suggesting the operational framework was already in place before the reported rule. Bitstamp's API also says rejected deposits are not automatically returned onchain, meaning customers may need to contact support to have assets sent back to the originator address. The development comes against the backdrop of EU Regulation 2023/1113, which requires crypto-asset service providers to assess whether a customer owns or controls a self-hosted address when transfers exceed €1,000, but does not mandate an automatic rejection of every transfer above that threshold.