To resolve the "name cannot exceed 14 characters" issue in PUBG Mobile, start by acquiring a Rename Card. These cards can be obtained through various means such as in-game events, Royale Pass rewards, or by purchasing them from the in-game shop using UC (Unknown Cash). Once you have a Rename Card, open the PUBG Mobile app and navigate to the Inventory section.
In the Inventory, locate the Box icon and tap it to access the Rename Card section. Choose the Rename Card you wish to use, and a window will appear. Enter your preferred new name, ensuring it adheres to PUBG Mobile's naming guidelines and stays within the 14-character limit.
So, Once satisfied with the new name, click on the Confirm button to complete the name change process. Keep an eye on in-game events for opportunities to obtain free Rename Cards or consider acquiring them through the Royale Pass for additional benefits.