The short answer: A source-of-funds review from your Canadian bank can be answered with a documented evidence chain from Ukraine. Sale contracts, inheritance certificates, income records, and registry extracts — apostilled where needed and translated into English — form the standard package. The main caveat: the bank's request letter governs everything, and answers built on guesses about what they want tend to trigger a second, harder round.
Behind the formal language, the bank's question is simple: show that this money comes from an identifiable, lawful origin and that the person sending it is connected to you in a documented way. The work is assembling that story from Ukrainian documents to the standard a Canadian compliance team reads, with translations and certifications attached in the format they expect.