How to choose the use of new security seal labels it?

The new seals (blockade) as an anti-theft lock (logo mark), has been used in more and more areas described below are four ways to identify:
First, we must first bolt seals choose a guaranteed quality reputation of the manufacturer (no reputation for quality assurance of products will not achieve security is not tight locking action).
Second, signed a contract before ordering. Requiring manufacturers tamper evident seal to promise not to third parties to provide the same number of new logos and seals (blockade) is very important.
Third, try not to choose the same size using a number of manufacturers have produced / color of the product (easily copied).
Fourth, any product has certain manufacturing costs, low prices of some products in the purchase must pay attention (by some manufacturers cut corners to reduce costs).