Endorse and indorse

Today the only difference between endorse and indorse is that endorse is now the preferred spelling. Formerly indorse meant ‘to sign one’s name to something’.

For example, you can indorse a check.

To endorse is to give one’s support or approval to something or somebody.

• I cannot endorse a candidate with a record like this. (= I cannot support a candidate with a record like this.)
• We had to abandon the plan because our manager refused to endorse it.

Today you can use endorse for all meanings.