Lenders and conveyancing solicitors usually ask for a signed gifted-deposit letter and evidence of where the money came from — typically the donor's bank statements showing the funds and the transfer. If the donor's documents are in another language, they need a certified translation.
Gifted deposits are common, and when the giver lives abroad the paper trail crosses borders. Your solicitor has to satisfy anti-money-laundering rules, so they'll want to follow the money from its source to your account, one document at a time. That can mean the donor's statements, evidence of how they came to have the funds, and the transfer record.
If the money came from selling property abroad, the sale contract or deed and the completion paperwork will usually be needed. If it came from an inheritance, expect to show the will or probate documents; our legal translation team handles those. Order the whole chain together so names and amounts are rendered consistently from document to document.