How do I verify my account to Tier 3? ICONOMI - Gregor K. March 12, 2018 15:15 Updated Follow In order to verify your account to Tier 3 custom withdrawal limits (not custom buy/sell limits), contact customer support. Please note that users must be on Tier 2 before they can upgrade to Tier 3. Related articles How do I verify my account to Tier 2? Levels of verification and tier limits Tier 2 - List of supported countries/ID documents How do I buy cryptocurrency? How do I verify my account to Tier 1? Comments 0 comments Article is closed for comments.