Amanda Bynes dodged a bullet Tuesday night ... when the quest to get a neck tattoo came up short ... because she couldn't prove her identity.

We're told Bynes showed up at The Honorable Society, a West Hollywood tattoo parlor, looking for a neck tattoo showcasing her phantom fiance Caleb.

Amanda's plan got derailed when the tattoo artist asked for ID -- she had none.

What's weird ... the tattoo artist knew it was Amanda, so it's unclear why they even got as far as the ID question.

Amanda left without incident.

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serving trix yogurt realness

what?

I was hoping she would actually look good

girl

Not feeling it

Thank goodness.

Her hair kind of slays

Queen