# setCustomIdErrors `function` in `custom-id` · v0.2.1 Replace what [`decode`](/packages/custom-id/0.2.1/classes/custom-id#decode) throws. One registration covers the whole process. The last call wins. Call this before any interaction is received. The stale constructor receives the route prefix. The invalid one receives a detail string. Neither carries the interaction. A per-user locale cannot reach either one. A [seedcord](https://seedcord.org) bot already calls this at import, swapping both defaults for `Notice` subclasses that render a card. Call it again with your own to change what the user reads. Return a `Notice` subclass from each arm. A plain `Error` would otherwise reach the user as the generic fault card. ```ts setCustomIdErrors(errors: CustomIdErrors): void ``` Replace what [`decode`](/packages/custom-id/0.2.1/classes/custom-id#decode) throws. One registration covers the whole process. The last call wins. Call this before any interaction is received. The stale constructor receives the route prefix. The invalid one receives a detail string. Neither carries the interaction. A per-user locale cannot reach either one. A [seedcord](https://seedcord.org) bot already calls this at import, swapping both defaults for `Notice` subclasses that render a card. Call it again with your own to change what the user reads. Return a `Notice` subclass from each arm. A plain `Error` would otherwise reach the user as the generic fault card. Parameters. - `errors` `CustomIdErrors` — Constructors for the two failure cases. Returns `void`.