imToken currently supports three LTC address formats.

• P2PKH: starts with “L”
• P2SH-P2WPKH: starts with “M”
• Native SegWit: starts with “ltc1q”

However, old addresses starting with "3" are not supported. If the recipient's address starts with "3," imToken will display the error "Incorrect wallet address."

How do I fix this?

Take the address starting with “3” as an example, you can fix this by the following methods.

Method 1: Export the LTC wallet mnemonic, import it into other wallets that support LTC addresses starting with 3.

Method 2: Transfer LTC to an exchange that supports addresses starting with 3, L or M, such as Binance. 

Disclaimer: The exchange service is provided by a third party, and this article does not constitute any investment advice.