# Anti-Dupe
\nCompatibility: Bukkit \/ Spigot \/ Paper \/ Purpur (1.21.11)<\/p>\n
## Key Features
\n**Advanced Item Duplication Prevention (For un-stackable items)**<\/p>\n
– Uses a hybrid system of deterministic hashes and per-item unique IDs to safely detect duplicated items without false positives.
\n**Lineage-Aware Serialization (For stackable items)**<\/p>\n
– Players can now combine similar stackable items even when items carry different lineage \/ NBT data.
\n– Lineage serial ranges are merged correctly
\n– No data is lost
\n-Inventory consolidation behaves like vanilla Minecraft<\/p>\n
**Inventory & Cross-Inventory Scanning**<\/p>\n
– Detects duplicate items within a player\u2019s inventory and across all online players.
\n– Keeps legitimate copies and removes only excess items.
\n**Custom Item Rules (Name-Based)**<\/p>\n
– Track custom items by display name, not NBT or material, preventing renamed items from bypassing detection.<\/p>\n
**Per-Item Hash Modes**<\/p>\n
– NAME \u2013 stackable items share a deterministic hash (ideal for currencies like Money Sachets)
\n– UNIQUE \u2013 non-stackable or special items get a unique ID per item<\/p>\n
**Custom Stack Sizes (Per Item)**<\/p>\n
– Define allowed stack sizes for both vanilla and custom items via commands or config.
\n **Always-Scanned Custom Items**<\/p>\n
– Custom items are always checked, even when onlyscan mode or material exclusions are enabled.
\n– Multi-Language Support<\/p>\n
Added in game language support for the following.<\/p>\n
“`
\nde_DE
\nen_US
\nes_ES
\nfr_CA
\nfr_FR
\nit_IT
\nja_JP
\npl_PL
\npt_BR
\nru_RU
\ntr_TR
\nuk_UA
\nzh_CN
\n“`<\/p>\n
**Safe Removal & Recovery System**<\/p>\n
– Excess duplicate items are backed up to recovery.yml instead of being deleted.<\/p>\n
**Multi-Language Discord Webhook Alerts (Embed Messages)**<\/p>\n
– Sends rich embed notifications in multiple languages to a Discord channel when a duplication is detected.<\/p>\n
**Admin Whitelist**<\/p>\n
– Exempt trusted players from all anti-dupe checks.
\n**OnlyScan Mode**<\/p>\n
– Scan only high-value items for performance, while still protecting all custom items.
\n**Automatic Ban Option**<\/p>\n
– Optionally bans players caught duplicating, with full logging.
\n**Hot Reload Support**<\/p>\n
– Reload custom item rules, stack sizes, hash modes, language files, and Discord config without restarting the server.
\n**Detailed Logging**<\/p>\n
– Duplication attempts logged in dupe_log.yml, bans recorded in bans.yml.<\/p>\n","protected":false},"excerpt":{"rendered":"
Stops exploiters on your Minecraft SMP from doing any sort of dupe this includes paper dupe.<\/p>\n","protected":false},"featured_media":15812,"template":"","meta":{"_minecraft_slug":"anti-duperz","_minecraft_project_id":"g2CcgBVC","_minecraft_author":"Shyclam472","_minecraft_license":"LicenseRef-All-Rights-Reserved","_minecraft_downloads":237,"_minecraft_follows":5,"_minecraft_client_side":"unsupported","_minecraft_server_side":"required","_minecraft_storage_type":"zip","_minecraft_archive_name":"anti-duperz.zip","_minecraft_size_bytes":3453633,"_minecraft_version_count":3,"_minecraft_updated_at":"2026-05-16T12:16:23.423291Z","_minecraft_date_created":"2025-06-17T23:49:21.302981Z","_minecraft_date_modified":"2026-04-02T17:25:25.432020Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/anti-duperz","_minecraft_icon_attachment_id":15812,"_minecraft_imported_at":"2026-05-31T18:39:41+00:00","_minecraft_import_hash":"be378b1b7b44600caf0390c3f7864406","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[124,89,126,127,128,123],"mod_loader":[130,132,133],"minecraft_version":[62,41,38,78],"class_list":["post-15857","mod","type-mod","status-publish","has-post-thumbnail","hentry","mod_category-bukkit","mod_category-game-mechanics","mod_category-management","mod_category-paper","mod_category-purpur","mod_category-technology","mod_loader-bukkit","mod_loader-paper","mod_loader-purpur","minecraft_version-1-21","minecraft_version-1-21-11","minecraft_version-1-21-4","minecraft_version-1-21-5"],"yoast_head":"\n