Livestock Microchipping Laws in Tennessee: What Producers Need to Know

If you raise cattle, horses, sheep, goats, or swine in Tennessee, you have probably asked yourself whether a microchip is enough to satisfy state and federal identification requirements — or whether you still need an ear tag. The answer depends on your species, your animal’s purpose, and whether you plan to move animals across state lines.

Tennessee’s livestock identification rules sit at the intersection of state regulations from the Tennessee Department of Agriculture (TDA) and federal animal disease traceability rules administered by USDA’s Animal and Plant Health Inspection Service (APHIS). Getting the two layers right matters for legal movement, disease response, and ownership documentation. This article breaks down each layer so you know exactly where a microchip fits — and where it does not.

Important Note: Livestock identification rules can change when USDA publishes new federal rules or when the TDA updates its regulations. Always verify current requirements with the Tennessee Department of Agriculture Animal Health office at (615) 837-5120 before moving animals interstate.

Microchipping vs. RFID Ear Tags: What Counts as Official ID in Tennessee

The terms “microchip” and “RFID” are often used interchangeably, but they describe different physical devices with different legal standing in Tennessee. An RFID ear tag is a button or panel tag clipped to the animal’s ear. A microchip — also called an electronic implantable device (EID) or injectable transponder — is inserted under the skin or into specific tissue sites.

In Tennessee, official animal identification includes “840 tags” (RFID or visual) and National Uniform Eartagging System (NUES) tags used in specific animal disease programs. These are the primary forms of official ID recognized for most routine livestock movement. 982-RFID tags are not considered official ID and should not be used at all. If you have any legacy 982-series chips or tags on your animals, they do not satisfy state or federal requirements.

Under federal rules, livestock required to be officially identified for interstate movement must have tags with a 15-digit animal identification number beginning with 840 — the numerical code for the USA — and bear the US shield. A microchip qualifies as official ID only in specific, narrowly defined situations described below, and it must carry an 840-series AIN to be recognized.

Device Type	Physical Form	Counts as Official ID?	Key Conditions
840 RFID Ear Tag	Button/panel tag on ear	Yes — primary method	Must be visually and electronically readable if applied after Nov. 5, 2024
NUES Metal Tag	Metal clip ear tag	Only if applied before Nov. 5, 2024	Grandfathered for life of animal; no new visual-only tags accepted
Implantable Microchip (840 AIN)	Injectable transponder under skin	Yes — species and context dependent	Requires registration papers, reader, and tattoo designation in most cases
982-Series RFID Tag/Chip	Various	No	Not accepted under any circumstances

The Federal RFID Mandate and What It Means for Tennessee Producers

The most significant recent change to livestock identification law came from USDA-APHIS, not the state of Tennessee. APHIS amended the animal disease traceability regulations to require that ear tags applied on or after a date 180 days after the rule’s Federal Register publication must be both visually and electronically readable to be recognized as official ear tags for interstate movement of covered cattle and bison. This rule became effective November 5, 2024.

Cattle tags applied after November 5, 2024, must be both visually and electronically readable (RFID). The types of cattle required to be identified when moving interstate remain unchanged. The list includes dairy cattle, sexually intact beef cattle 18 months or older, and rodeo and exhibition cattle.

Official metal tags that conform to the National Uniform Eartagging System and were applied before the November 5, 2024, deadline will continue to be accepted. So if your cow already had a valid metal tag before that date, you do not need to re-tag her. But any new tag you apply today must be electronically readable.

Pro Tip: Congress allocated $15 million to USDA to help offset the cost of transitioning to electronic tags. These tags were allocated to states on a percent basis of how many cows exist in each state. Contact the TDA Animal Health office to ask whether free or subsidized 840 RFID tags are still available for your Tennessee operation.

Cattle and bison of any age used for rodeo or recreational events, and cattle and bison of any age used for shows or exhibitions, also require electronic tags. Cattle and bison going directly to slaughter are exempted from official identification requirements. If you are a Tennessee producer shipping directly to a USDA-inspected slaughter facility, the electronic tag mandate does not apply to that movement.

You can read more about how these rules intersect with hauling requirements in this overview of transporting livestock laws in Tennessee.

Which Livestock Can Use a Microchip as Official Identification in Tennessee

Not every species can substitute a microchip for an ear tag. Tennessee’s rules, which align with federal APHIS guidance, recognize implantable microchips as official ID for specific species under specific conditions. Cattle and bison are ear-tag-first animals — the federal mandate centers on RFID ear tags, not implants, for that species class.

For equine, the picture is different. Equine must have permanent, individual animal identification in the form of a unique lip tattoo, brand, electronic implant, or digital photograph, which must be incorporated into the permit. An electronic implant — that is, a microchip — is explicitly listed as an accepted form of permanent ID for horses moving under an equine interstate event permit or accompanying a Certificate of Veterinary Inspection (CVI).

840 AINs are available in microchip implants for equine and other species. This means your horse can carry an 840-series injectable transponder that satisfies both state and federal traceability requirements, provided the number is recorded on the CVI.

For sheep and goats, electronic ID (microchip) with the number recorded by a registry, accompanied by registration papers and a reader, is accepted. The ear must be tattooed with an “E” for ear implant or “ET” to designate a tail implant. Earless goats may be tagged in the tail fold. The tattoo requirement is a hard rule — the microchip alone is not sufficient without the corresponding body marking.

Unregistered animals can now be microchipped, but they must be from a flock registered with the Scrapie Database (have a Flock ID), tattooed with the flock ID, have the E or ET tattoo, and be accompanied by an ICVI or Owner Hauler Statement listing the implant number as well as a reader. This expanded the microchip option beyond registered purebreds, but the paperwork and tattoo requirements still apply.

For swine, identification for slaughter and feeder swine centers on ear tags or tattoos bearing the Premises Identification Number. For slaughter swine and feeder swine, an ear tag or tattoo bearing the Premises Identification Number assigned by the State Animal Health Official to the premises where the swine originated is required. Implantable microchips are not the standard identification device for swine under Tennessee or federal rules.

When a Microchip Qualifies for Interstate Movement in Tennessee

Moving animals across state lines triggers the strictest identification requirements. Tags and health certificates or owner/shipper statements are required to move animals across state lines. A microchip alone — without the supporting documentation — will not get your animals cleared at the border.

For cattle and bison, the federal ADT rule governs. Ear tags, not microchips, are the required device. For equine, a microchip recorded on an official CVI or equine interstate event permit satisfies the identification requirement for interstate movement. For sheep and goats, electronic implantable devices (EID) qualify when the animal is accompanied by a reader and a copy of the registration certificate that includes the EID number and is in the current owner’s name.

USDA-compliant microchips qualify as official ID for certain species if the number is recorded in a Purebred Registry Association book, with registration papers attached to the CVI. That phrase — “attached to the CVI” — is critical. The microchip number must appear on the health certificate your accredited veterinarian issues. If the vet does not record the chip number on the paperwork, the animal is effectively unidentified for movement purposes.

Key Insight: If you are moving sheep or goats out of Tennessee, check the destination state’s requirements before you load. Tennessee follows the minimum federal requirement for sheep and goat identification. Other states may have more stringent requirements. What satisfies Tennessee may not satisfy the receiving state.

For a broader look at what the law requires when hauling animals on Tennessee roads and highways, see this guide to livestock transportation laws in Tennessee.

Approved Microchip Standards and Placement by Species in Tennessee

Tennessee defers to USDA-APHIS standards for approved microchip devices. Any injectable transponder used as official ID must carry an 840-series Animal Identification Number and operate at the correct radio frequency to be read by standard APHIS-approved scanners.

Approved devices for EIDs include 134.2 kHz LF RFID tags compliant with both the 11784 and 11785 ISO standards, or UHF RFID tags. These are the same ISO standards used internationally, which is why 982-series chips — common in European livestock programs — are not accepted. They do not carry an 840 AIN and cannot be read as official US identification.

Placement requirements vary by species and are tied to the body-marking rules that make the implant verifiable at inspection:

• Equine: Injectable transponder implanted in the nuchal ligament of the neck is the standard site used by most accredited veterinarians. The chip number must be recorded on the CVI or equine permit.
• Sheep (ear implant): Electronic ID microchip with the number recorded by registry, accompanied by registration papers and reader. The ear must be tattooed with an “E” to designate an ear implant.
• Sheep/Goats (tail implant): Electronic ID microchip with number recorded by registry, accompanied by registration papers and reader. The ear must be tattooed with “ET” to designate a tail implant.
• Goats (earless): Earless goats may be tagged in the tail fold.
• Deer/Elk and Equine: Injectable transponders using FDX technology are approved for equine, deer/elk, and sheep/goat species under APHIS official AIN device listings.

Always bring a compatible reader when transporting microchipped animals. Without a working reader at the point of inspection, the chip cannot be verified, and the animal may be treated as unidentified regardless of the paperwork you carry.

Registering a Livestock Microchip in Tennessee

Applying a microchip is only the first step. The number must be registered to be traceable, and traceability is the entire point of the identification system. Tennessee uses a two-part registration structure: premises registration and animal-level ID recording.

Step 1: Register your premises. A premises is the location where animals reside. The premises address must be a physical address — do not list a post office box. The address must be a 911 address, or you must supply latitude and longitude for the entrance to the property. Species covered by the premises registration system include bovine/bison, camelids, goats, equine, rabbits, sheep, swine, poultry, ratites, and others.

You can submit a premises registration form to the Tennessee Department of Agriculture, Attention: Premises Registration, P.O. Box 40627, Nashville, TN 37204, or contact the Animal Health office at (615) 837-5120 / animal.health@tn.gov. You can also take the form to your local Farm Service Agency office.

Step 2: Record the microchip number with the appropriate registry. For registered purebred animals, the microchip number must be entered in the breed association’s registry book, and registration papers showing that number must travel with the animal. For unregistered sheep and goats, the animal must be from a flock registered with the Scrapie Database and be accompanied by an ICVI or Owner Hauler Statement listing the implant number.

Step 3: Ensure the CVI reflects the chip number. When your accredited veterinarian issues a Certificate of Veterinary Inspection for any movement, the microchip’s AIN must appear on that document. A CVI must show individual animal identification numbers that include the official ear tag number, breed association registration tattoo or brand numbers, breed association registration number, and any other official individual identification on each animal to be moved.

Pro Tip: After tagging or chipping animals for youth livestock programs in Tennessee, tag administrators are required to report 840 RFID tag assignments back to the TDA. To complete the traceability loop, tag numbers must be reported back to TDA where they administer the 840-RFID tags. The same reporting principle applies to producers managing their own tag inventories.

Tennessee beekeepers and small-acreage farmers who also keep livestock should note that premises registration covers all species on a property. If you keep bees alongside goats or sheep, a single premises ID covers the location. Learn more about agricultural regulations in the state through this guide to beekeeping laws in Tennessee.

Microchipping as Proof of Ownership in Tennessee

A microchip’s value as proof of ownership depends entirely on the paper trail attached to it. Unlike a dog’s microchip registered to a named owner in a national database, a livestock microchip operating under the 840 AIN system links an animal to a premises and, where applicable, a breed registry — not directly to an individual person’s name in a searchable consumer database.

For registered purebred animals, the ownership chain is strongest. The breed association’s registration certificate lists the current owner, and the microchip number appears in that certificate. When those registration papers travel with the animal, the chip provides a tamper-resistant link between the physical animal and the documented owner. USDA-compliant microchips are recognized when the number is recorded in a Purebred Registry Association book with registration papers attached to the CVI.

For unregistered animals, the ownership connection is weaker but still functional. The premises ID ties the animal to a physical location registered under an owner’s name. If an animal goes missing and is later scanned, the chip’s AIN can be traced to the originating premises through USDA’s Animal Identification Management System, which can then be cross-referenced with the premises owner of record.

It is against federal law to remove official ID from a livestock animal. This protection applies to ear tags and, by extension, to any official identification device including microchips. Removing or altering a chip to obscure ownership is a federal offense, which makes the implant a more durable ownership marker than an ear tag that can fall out or be cut off.

That said, a microchip alone does not substitute for a bill of sale, brand registration, or other legal ownership documentation in a civil dispute. Tennessee courts and law enforcement agencies look at the totality of evidence in livestock theft cases. A chip linked to your premises ID, combined with registration papers and purchase records, creates the strongest ownership case. A chip with no supporting documentation is harder to act on quickly.

If you are concerned about livestock theft or neighbor disputes involving animals on your property, Tennessee law also addresses related situations. See these guides on neighbors’ dogs on your property and neighbors’ cats in your yard for how Tennessee handles animal trespass more broadly.

Scenario	Does Microchip Support Ownership Claim?	What Strengthens the Claim
Registered purebred with registry papers	Yes — strong link	Registration certificate + CVI with chip number
Unregistered animal, premises ID registered	Partial — traces to premises	Premises registration record + bill of sale
Chip present but not recorded anywhere	Minimal	Must register premises and record AIN with TDA
Chip removed or altered	No — federal offense	Removal is illegal; report to USDA-APHIS

Understanding how animal identification intersects with broader Tennessee animal law can help you stay compliant across your entire operation. Related topics include animal cruelty laws in Tennessee, hunting laws in Tennessee, and wildlife removal laws in Tennessee for producers who manage mixed rural properties.

Tennessee livestock producers operate under a layered identification system where microchips play a real but limited role. They are fully accepted for equine, conditionally accepted for sheep and goats with proper tattoos and registration paperwork, and not the primary device for cattle, bison, or swine. Keeping your premises registered, your chip numbers recorded on CVIs, and your registration papers current is the practical way to make sure a microchip actually does the job you need it to do — whether at a state line, an auction barn, or in a livestock theft investigation.