The rules are very clear. You can legally vote in the state where you last held legal residence. Using any other address might constitute voter fraud. I think the rationale is to prevent the possibility of a large amount of non resident voters voting in a particular election to influence the result. By using the address where you last resided shows some logical reason for your voting in an election in that area.
To my knowledge CR residents who reside outside of the country do not get to vote unless they return to Costa Rica and cast their ballot in person. I could be mistaken on that and perhaps someone here as different information.
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Pura Vida

Only Irish coffee provides in a single glass all four
essential food groups:
alcohol, caffeine, sugar and fat.
Alex Levine
