The A1 Certificate is essential for posted workers, freelancers, and employers sending staff abroad within the EU/EEA or Switzerland. It ensures you don’t pay double social security contributions and keeps your assignment compliant.
But many applications face unnecessary delays because of common mistakes. To save time and avoid penalties, here are the 10 mistakes that slow down your A1 approval—and how to avoid them.
1. Applying Too Late
Always apply before the assignment begins. Late applications can trigger fines and compliance issues.
2. Submitting Incomplete Documents
Missing contracts, assignment details, or proof of employment will put your request on hold.
3. Providing Incorrect Assignment Duration
The A1 is usually valid for 12 months. If you need up to 18 months, request the extension from the start.
4. Forgetting to Notify the Host Country
Some EU countries require notification before work begins. Skipping this step risks both delays and fines.
5. Not Keeping Copies Handy
Authorities can request the A1 at any time. Workers should always carry a copy while abroad.
6. Assuming SMEs Are Exempt
Posting rules apply to all companies—from freelancers and startups to multinationals.
7. Using the A1 for Non-EU Countries
The A1 only applies within the EU/EEA and Switzerland. For other destinations, different agreements may apply.
8. Overlooking Renewal Deadlines
Expired A1s cause compliance gaps. Employers must track and renew before the certificate runs out.
9. Ignoring Self-Employed Rules
Freelancers also need the A1. Applications must prove genuine self-employment in the home country.
10. Not Seeking Expert Help
Errors in forms or misinterpretation of rules are major causes of delays. Advisory support speeds up the process.
Where to Apply
In Portugal, the A1 is issued by Segurança Social.

Official reference: Segurança Social – A1 Certificate
How Jubipath Speeds Up the Process
- Expert checks on all application documents
- Guidance for employers, workers, and freelancers
- Support with host country notifications
- Integrated advice on visas and EU work mobility
Conclusion
Delays in A1 approvals can disrupt projects, increase costs, and put workers at risk. By avoiding these 10 common mistakes, you ensure fast approval and full compliance.
At Jubipath, we make the process smooth and stress-free.