# Memorization & Membership Inference: Training Data Extraction Probe

> Source: https://sukruyusufkaya.com/en/learn/fine-tuning-cookbook/ftc-memorization-membership-inference
> Updated: 2026-05-14T14:43:02.193Z
> Category: Fine-Tuning Cookbook (Model-by-Model)
> Module: Part XVI — Production Operations
**TLDR:** FT models may have memorized PII, secrets, copyrighted text from training data. Membership Inference Attack (MIA) test: feed random training snippets, does model continue? Detection thresholds. Mandatory pre-deploy check for KVKK + GDPR compliance.