# Understanding Allowlists, Approved Addresses, Address Whitelists and Security Holds A number of cryptocurrency exchanges have security features that require cryptocurrency to only be transferred to approved external addresses. These can often have different processes in order to approve them, such as waiting period before the address is enabled, or additional forms of identify verification (such as for larger transactions). These are features that are enabled by the exchange account holder or exchange themselves and are outside of the control of The Giving Block. It's very important that donors take these into account when planning last minute donations at the end of year, and add any addresses in enough time to ensure that they can make their planned donations before end of tax year. Instructions for different exchanges are below: * [Binance: Withdrawal whitelist](https://www.binance.com/en/support/faq/how-to-enable-withdrawal-whitelist-on-binance-1d08944f103b4fc78d3519913b600086) * [Bybit: Withdrawal address whitelist + 24 hour withdrawal lock](https://www.bybit.com/en/help-center/article/How-to-Manage-Your-Withdrawal-Address-Book) * [Coinbase: Address book allowlist + 48 hour security hold period](https://help.coinbase.com/en/coinbase/managing-my-account/other/address-book-allowlist) * [Crypto.com: 24 hour withdrawal lock on newly added addresses](https://help.crypto.com/en/articles/6006803-24h-withdrawal-lock-on-newly-added-withdrawal-address) * [Gemini: Approved addresses + 7 day approval period](https://support.gemini.com/hc/en-us/articles/360001411543-What-is-an-Approved-Address-) * [Kraken: 24 hour withdrawal hold if 2FA is not enabled ](https://support.kraken.com/hc/en-us/articles/360000672863-Adding-and-confirming-a-new-cryptocurrency-withdrawal-address) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://faq.thegivingblock.com/faq/frequently-asked-questions/understanding-allowlists-approved-addresses-address-whitelists-and-security-holds.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.