Each Member State's national VAT legislation must comply with the provisions of EU VAT law as set out in Directive 2006/112/EC. This Directive sets out the basic framework for EU VAT, but does allow Member States some degree of flexibility in implementation of VAT legislation. For example different rates of VAT are allowed in different EU member states. However Directive 2006/112 requires Member states to have a minimum standard rate of VAT of 15% and one or two reduced rates not to be below 5%. Some Member States have a 0% VAT rate on certain supplies- these Member States would have agreed this as part of their EU Accession Treaty (for example, newspapers and certain magazines in Belgium). The current maximum rate in operation in the EU is 25%, though member states are free to set higher rates.

VAT that is charged by a business and paid by its customers is known as "output VAT" (that is, VAT on its output supplies). VAT that is paid by a business to other businesses on the supplies that it receives is known as "input VAT" (that is, VAT on its input supplies). A business is generally able to recover input VAT to the extent that the input VAT is attributable to (that is, used to make) its taxable outputs. Input VAT is recovered by setting it against the output VAT for which the business is required to account to the government, or, if there is an excess, by claiming a repayment from the government.

You can verify the validity of a VAT number issued by any Member State by selecting that Member State from the drop-down menu provided, and entering the number to be validated.

The service provided by vatthefuck.eu is free of charge and provided AS-IS.
This VAT validation is BETA

Member State	Structure	Format
AT-Austria	ATU99999999	1 block of 9 characters
BE-Belgium	BE0999999999	1 block of 10 digits
BG-Bulgaria	BG999999999 or BG9999999999	1 block of 9 digits or 1 block of 10 digits
CY-Cyprus	CY99999999L	1 block of 9 characters
CZ-Czech Republic	CZ99999999 or CZ999999999 or CZ9999999999	1 block of either 8, 9 or 10 digits
DE-Germany	DE999999999	1 block of 9 digits
DK-Denmark	DK99 99 99 99	4 blocks of 2 digits
EE-Estonia	EE999999999	1 block of 9 digits
EL-Greece	EL999999999	1 block of 9 digits
ES-Spain	ESX9999999X	1 block of 9 characters
FI-Finland	FI99999999	1 block of 8 digits
FR-France	FRXX 999999999	1 block of 2 characters, 1 block of 9 digits
GB-United Kingdom	GB999 9999 99 or GB999 9999 99 999 or GBGD999 or GBHA999	1 block of 3 digits, 1 block of 4 digits and 1 block of 2 digits or the above followed by a block of 3 digits or 1 block of 5 characters
HR-Croatia	HR99999999999	1 block of 11 digits
HU-Hungary	HU99999999	1 block of 8 digits
IE-Ireland	IE9S99999L or IE9999999WI	1 block of 8 characters or 1 block of 9 characters
IT-Italy	IT99999999999	1 block of 11 digits
LT-Lithuania	LT999999999 or LT999999999999	1 block of 9 digits, or 1 block of 12 digits
LU-Luxembourg	LU99999999	1 block of 8 digits
LV-Latvia	LV99999999999	1 block of 11 digits
MT-Malta	MT99999999	1 block of 8 digits
NL-The Netherlands	NL999999999B99	1 block of 12 characters
PL-Poland	PL9999999999	1 block of 10 digits
PT-Portugal	PT999999999	1 block of 9 digits
RO-Romania	RO999999999	1 block of minimum 2 digits and maximum 10 digits
SE-Sweden	SE999999999999	1 block of 12 digits
SI-Slovenia	SI99999999	1 block of 8 digits
SK-Slovakia	SK9999999999	1 block of 10 digits

We have made the API as simple as possible.
You only need to make a GET request with the VAT-number to validate against VIES database.
https://vatthefuck.eu/api/{string VAT-number}

Request example:
https://vatthefuck.eu/api/SE554433221101

Response example:

{
	"code": 200,
	"desc": "Yes, valid VAT number",
	"validateddata": {
		"vatnumber": "SE 554433221101",
		"vatcountry": "SE",
		"organization": "Example Company",
		"address": [
			"Example street",
			"12345 Example city"
		]
	}
}

Json Response Codes:
200 - Yes, valid VAT number
400 - Failed to get validation
404 - VAT number missing
500 - No, invalid VAT number
501 - No, invalid VAT number format
504 - Timeout