Recommended Free Tools
iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
The EU’s once-only principle is meant to spare people and businesses from submitting the same official evidence repeatedly in certain cross-border administrative procedures. When a procedure is covered and the relevant authorities are connected, the applicant can ask the authority handling the case to retrieve evidence directly from an official source in another EU Member State through the Single Digital Gateway’s Once-Only Technical System (OOTS).
It is a scoped, user-requested exchange—not a rule that every government service is online, that every document can be shared, or that a business automatically qualifies for a permit or benefit. For businesses, it can reduce repeat paperwork in eligible procedures. For public authorities, it requires the ability to request or provide evidence through a shared technical framework while applying the relevant legal and data-protection safeguards.
What the once-only principle means
The once-only principle is the idea that a person or business should not have to provide information to public authorities more than once when the information is already held by an authority and can lawfully be reused. In the EU Single Digital Gateway, the principle is implemented for specified procedures through cross-border evidence exchange: an authority dealing with an application may obtain relevant official evidence from an authority in another Member State instead of asking the applicant to find and submit the document again.
The legal framework is the Single Digital Gateway Regulation, Regulation (EU) 2018/1724. It links the principle to specified procedures and defines a technical system for automated evidence exchange between competent authorities in different Member States. The regulation does not create a general right for any public body to search any other body’s records. Its scope is tied to the procedures and evidence covered by the framework. The consolidated text of Regulation (EU) 2018/1724 and the EUR-Lex legal summary set out the legal basis.
#1 Best Overall
- Powerful Turbo Fan:CAGIWIRU Electric Air Duster have reached speed up to 130000RPM,Can efficient remove dust and debris.With LED light and Three Adjustable Speed to meet with different cleaning tasks.
- With Attached USB C Fasting Charging cable.Charing 3 hours,Enjoy up to 240 minutes of use on the lowest setting, For third speed can use for 25mins.with four charging options to meet with your needs.
- Wide Application:Upgraded attached 5 different nozzles,making it suitable for a variety of scenes, such as car,pet, pc, keyboards, and other electronic devices. It also serves for office and home clean duster.
- Handy Design & Portable:Cordless air duster electric nozzle is Light weight and small size, design and comfortable to hold and space saving, convenient to carry around. You can put it in your room or inside the car without taking up space.
- Warranty & Support: Our Electric air duster comes with 5 years warranty and 24/7 customer service. During this period, if you have any questions,pls kindly feel free to contact us.
The principle concerns evidence and administrative burden, not the substantive rules for a case. If a company applies for a registration, authorisation, or other service, retrieving evidence more easily does not change the eligibility criteria, deadlines, fees, or decision the competent authority must apply. The authority still assesses the application under the applicable rules.
How the Single Digital Gateway and OOTS differ
The Single Digital Gateway is the broader EU initiative for making information, procedures, assistance, and problem-solving services easier to access online. Its Your Europe portal and national portals help users find information and services. OOTS has a narrower, technical role: it supports the requested exchange of evidence between authorities in different Member States for in-scope procedures. The gateway is therefore not synonymous with OOTS, and finding a procedure through a gateway does not by itself mean that evidence retrieval is available for it.
The European Commission describes OOTS as infrastructure that connects public authorities so that evidence can be exchanged from authentic sources. It uses a decentralized architecture; it is not a single EU database that collects all the evidence held by national authorities. The system’s common technical and interoperability components enable an exchange, while the relevant national authorities remain the source of the records and the authorities responsible for the procedure. See the Commission’s overview of the Single Digital Gateway and Your Europe and the OOTS hub overview.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →How an OOTS evidence request works
For a business, the practical experience begins in the online procedure offered by the Member State where the application is being made. If that procedure supports OOTS and the relevant authorities are connected, the business can request that the receiving authority obtain specified evidence from the authority that holds it in another Member State. This may avoid having to locate, download, and upload an official document a second time.
Rank #2
- Screen Cleaner is Your Screen’s New Bestfriend! - EVEO is proud to present a screen cleaner that’s perfectly suited for your TV. Meet your new screen cleaner, computer screen cleaner, laptop cleaner, iPad cleaner, Macbook,tv cleaner or any other electronic device. Our screen cleaner spray and wipe along with the included plush microfiber cloth, easily removes dust, fingerprints & other smudges on the screen’s surface. Clean effectively for a streak-free screen
- Gentle on your Screens - Our screen cleaner spray and wipes is compatible to be used even for the most sensitive LCD, LED, CRT, and OLED screens in proper use. Be at ease knowing that this product is compatible with all the major brands: LG, SONY, Samsung, Sharp, iPad, iPhone, Android screens, Kindle, PC monitors - we’ve got you covered! Can be used as LCD screen cleaner, tv cleaner, smart tv screen cleaner, and more
- Premium Super Soft Plush Microfiber Cloth - Included in this efficient screen cleaning kit. This screen cleaner spray and wipe has our signature plush microfiber cloth specially designed to comply with screens and monitors and leave them streak-free. Has been shown to effectively absorbs stubborn stains, zero streaks, and no fiber shedding. Always use this together with our screen cleaner for the best results
- Easy-to-Use Screen Cleaner Kit + microfiber cleaning cloth - The EVEO Screen Cleaning Kit will easily be your new favorite tool when it comes to taking care of the things you love most, quick and easy solution for a streak-free screen. Simply screw on the sprayer gun on the screen cleaner bottle. Spray the cleaning liquid onto the microfiber cloth, then wipe the screen until desired cleanliness & shine is achieved.
- Quality Screen Care Kit Worth Purchasing - Enjoy a convenient Screen Cleaner anytime, anywhere you need it. Your satisfaction is our top priority. We stand behind the quality of our products and that’s why, you shouldn’t be worrying at all. We manufacture the Best Screen Cleaner. and can be used for laptop cleaning kit, laptop screen cleaner, tv screen cleaner for smart tv. MacBook screen cleaner, monitor cleaner or screen cleaner spray for electronic devices with microfiber cleaning cloth
- Open the relevant national procedure. Start with the portal for the authority or service where the business is applying. Check the procedure’s stated scope, requirements, and available online options; OOTS does not make every service available through one EU-wide application form.
- Check whether evidence retrieval is offered. If the procedure and connected authorities support the exchange, the interface should provide a way to request evidence from an official source. If there is no such option, the principle alone does not mean that the authority can retrieve the record through OOTS.
- Make the request and review the evidence where offered. The Commission describes the exchange as being initiated at the citizen’s or business’s explicit request, with an opportunity to preview the information before it is exchanged. Union or national law may provide otherwise. The Commission’s explanation is in its 20 July 2022 article on OOTS.
- Allow the authority to use the retrieved evidence in the procedure. The authority handling the case remains responsible for assessing the application. Evidence exchange can reduce document handling, but it does not guarantee a particular outcome or remove other requirements.
The procedure’s interface and the evidence available depend on the service and participating authorities. The system is designed to use official sources, but users should still follow the portal’s instructions and check whether any other documents or actions remain necessary.
Which procedures and evidence are covered?
Coverage is defined rather than universal. The Regulation connects the gateway to procedures listed in Annex II and certain procedures under other EU directives. OOTS supports automated evidence exchange for an in-scope procedure between competent authorities in different Member States. It does not apply automatically to every national administrative interaction, every type of record, or every cross-border business activity.
That distinction matters because the same business may encounter both covered and uncovered steps. An online procedure may provide general information but not an OOTS evidence request; a particular authority may be connected for some evidence but not for every record relevant to a case. The practical test is whether the specific procedure offers the exchange and whether the relevant source authority can provide the requested evidence through the system.
OOTS also does not make all evidence legally interchangeable. What is relevant, which authority holds it, and whether it may be used in a particular procedure depend on the applicable rules. The principle is intended to reduce repeated submission where the framework permits retrieval, not to override national requirements or expand a procedure’s scope.
Rank #3
- 【Large size】：Measuring 800 x 300 mm/ 31. 5×12 inches, which is wider and taller than others. Large mouse pad can perfectly fit your keyboard and mouse of any size, and there is also ample space for peripherals such as phones, tablets, etc.
- 【LED backlight mouse pad】：Blade Hawks RGB mouse pad provides 7 static modes and 7 dynamic modes will give you the options you are looking for. Power-off memory function remembers the last lighting mode you selected. The super glow fiber Chroma will give you a colorful gaming setup that you want.
- 【Anti-slip rubber base】：Made from Natural rubber, this gaming mousepad will firmly grip your desktop, allowing you to enjoy the ultimate precision in the games you are most passionate about. It also comes with a texture that enhances this ability even further.
- 【Smooth and waterproof surface】: Micro-textured cloth surface, for extremely precise mouse control and a smooth movement. When liquid splashes on the gaming mouse pad, it forms water droplets and slides down. Will not delay your work or gameplay.
- 【Plug and play】: This mouse and keyboard pad is powered by USB, plug and play, no driver required. One button control light modes. Press one time to change the lighting mode, press twice to change the brightness, press and hold about 3 seconds turn ON/OFF.
What businesses gain—and what does not change
For a company operating across borders, repeat requests for official records can add administrative work: staff may need to identify the correct authority, obtain a document, confirm its format, and submit it to another public body. An OOTS-supported request can shift that evidence retrieval from the applicant to the authorities. The potential benefit is greatest when the procedure is genuinely cross-border, its required evidence is available from a connected authority, and the online process supports the request.
The Commission identifies burdens such as fragmented information, paper-only procedures, and national technical barriers—for example, requirements involving accepted phone numbers, postal codes, or payment methods. The Single Digital Gateway is intended to address parts of that broader friction, but OOTS addresses evidence exchange specifically. It should not be treated as a fix for every obstacle a company may encounter while using a national service.
The Commission’s Single Digital Gateway page gives an expected company savings figure of more than €11 billion per year. This is the Commission’s estimate or expectation, not a figure established here as savings already realized by businesses. A company’s actual time or cost reduction will depend on its procedures and circumstances.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
In practical terms, businesses should not assume that an online cross-border procedure is paperless just because the once-only principle exists. Before preparing an application, check the national procedure page, identify its evidence requirements, and look for a supported option to request evidence from another Member State. If the option is not available, follow the procedure’s stated submission route and ask the responsible authority what evidence it accepts.
Rank #4
- 【Softer and More Comfortable】Vaydeer wrist rest has unique diamond pattern, which is the combination of softness and aesthetics. The materials of wrist rest are improved into higher quality memory foam and covered with silky smooth lycra. The computer wrist rest makes you as comfortable and cushiony as like rest your wrists on clouds.
- 【Ergonomic Wrist Saver】The wrist rests for keyboard and mouse comes with a 17.32×3.15×0.83 inch keyboard wrist pad and a 5.94×3.15×0.83 inch mouse wrist support. Based on ergonomic design, the unique concave shape is the perfect fit for your wrist joints. The wrist rest pad fits most computer keyboards and laptops, improve hand and wrist posture, release your wrist and arm stress.
- 【Non-Slip Rubber Bottom】Featuring an anti-skid silicone base on the bottom, this wrist keyboard support stays firmly in place on your desk, preventing the padding from sliding around, ensuring stable and consistent wrist support during extended computer sessions.
- 【Better Experience & Pain Relief】Our keyboard arm rest is beneficial to alleviate the soreness caused by direct contact and friction between your arm and a hard desk surface, reducing the risk of wrist fatigue or carpal tunnel. The soft texture of memory foam can evenly distribute the pressure around your wrists and provide good support with just enough give.
- 【Helpful in Multiple Scenarios】Whether you're working, studying, writing, typing, gaming, this keyboard and mouse rest combo is an essential accessory to add comfort and support to your hands and wrists. It’s also a great gift for men, women, family, friend, coworker, gamer, teacher, etc.
What public authorities need to do
A public authority may act as an evidence requester, an evidence provider, or both. A requester must be able to make the relevant request as part of an in-scope procedure; a provider must be able to return appropriate evidence from its official records. Authorities therefore need to coordinate with national counterparts and connect relevant systems to the shared interoperability framework.
Implementation is not simply a matter of putting a document online. The technical specifications and supporting documents govern how systems exchange requests and evidence. Authorities must also account for the legal basis and purpose of each exchange, applicable data-protection obligations, and cybersecurity requirements. The decentralized design means that authorities retain their roles as holders and users of records rather than transferring all evidence into a central EU repository.
For an authority assessing implementation, useful questions include:
- Which procedures handled by the authority fall within the Regulation’s scope?
- For each procedure, which evidence items may be requested from another Member State, and which authorities are the authentic sources?
- Can the authority act as a requester, a provider, or both using the common technical framework?
- How will the user’s request and any preview opportunity be presented, subject to exceptions under Union or national law?
- How will the exchange fit the authority’s existing case-management, records, security, and data-protection processes?
These are implementation responsibilities, not proof that every authority has completed onboarding. The existence of common specifications and a live system does not mean every national service or evidence source is equally connected.
Best Value
- 【No Drill Mounted】Cable management tray can be assembled in as little as 3 minutes or less-simply. Side clips easily clampe the edge of desk, pass through the holes on the sides, and secure excess cables with baskets. Desk cable management supports inward or outward installation to meet your needs in different scenarios, and provides you with great convenience when collecting and organizing wires.
- 【Rubber Pad Protects Desk】Wire organizer under desk built-in soft rubber pads on the clamp protect your desk from scratches, so you will not damage your furniture or office.
- 【Sturdy and Beautiful】Cord management under desk is made of high-quality carbon steel and holds about 15 lbs. The wire basket has 2 holes on each side of the tray to enable your cables to pass freely. Cable baskets are suitable for desk thickness use from 0.4" to 2.4".
- 【Space Saving & Keep Organized】Desk cable management tray holds all your power cords, outlet strips, USB hubs and computer transformers hidden from your feet, and the data cables will not enter the vacuum cleaner to keep your desk clean and tidy. Desk wire organizer is also suitable for use in the kitchen and outdoors.
- 【Reduce Safety Risks】Cable tray under desk keeps all plugs away from your kids, no more worry about tripping. Using 2 holes wire tray saves extra space, helps you easily cabling and wire protection. The mesh design is not easy to accumulate dust, but avoids safety accidents caused by messy wires.
Coverage figures and implementation dates
The Commission’s OOTS hub showed 232 administrative procedures, 60 procedural requirements, 372 evidence items, and 107 authorities when accessed on 13 October 2026. The hub page was last updated on 8 June 2026. It defines the procedures as those allowing users to request evidence from another Member State, and evidence as official documents or data retrieved by competent authorities in response to a citizen’s or business’s request. These are dynamic system coverage indicators, not a count of all public services or a guarantee that every exchange is live or available in every location.
The Commission said the core OOTS infrastructure launched on 12 December 2023. Earlier, in a 20 July 2022 article, it described 21 procedures in Annex II as due to be made available fully online by December 2023. That 21-procedure figure refers to the historical implementation milestone as described in 2022; it is not the current procedure total displayed by the OOTS hub.
Because system coverage and national implementation can change, businesses should use the current national procedure portal to determine whether a particular evidence request is available. Authorities should use the Commission’s OOTS hub and relevant technical materials to understand the system’s present scope and implementation framework.
Common misunderstandings
- “Once-only means I never submit a government document again.” No. The principle applies to specified procedures and evidence exchanges, not every service or record.
- “The authority can access any record held anywhere in the EU.” No. OOTS supports a defined exchange between competent authorities in different Member States for relevant evidence and in-scope procedures.
- “The EU stores every exchanged document in one database.” No. The architecture is decentralized; evidence comes from official source authorities.
- “If evidence is retrieved, the application is approved.” No. The authority still applies the procedure’s substantive requirements.
- “The Single Digital Gateway is the OOTS evidence system.” Not exactly. The gateway also supports access to information, procedures, assistance, and problem-solving services; OOTS is its technical evidence-exchange component.
What the principle means in practice
For a business, the useful expectation is narrower than “one submission for everything,” but more concrete: where the procedure is covered, the authorities are connected, and the evidence can be exchanged, the applicant may request that official information be retrieved rather than submitted again. For a public authority, the corresponding task is to support the relevant request or provide the official evidence through the common framework while meeting legal, technical, and security obligations.
The once-only principle is therefore best understood as a targeted improvement to cross-border administration. Its value lies in removing a repeated evidence-handling step when the law, procedure, and connected systems allow it—not in replacing national procedures or guaranteeing universal digital access.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
