The warranty for Nike shoes is typically valid for two years from the date of purchase. This warranty covers any manufacturing defects or issues with the materials used in the shoes. It is important to keep the original receipt or proof of purchase in order to make a warranty claim. Nike may repair or replace the shoes if they are found to be defective within the warranty period. **

Without more context or information about the stamp in question, it is difficult to determine if it is valid. Stamps can become invalid if they are expired, counterfeit, or not properly affixed to the mail. It is important to check the date, authenticity, and condition of the stamp to ensure its validity. **

Based on the information provided, it appears that the contract may not be valid as it was signed under duress. Duress involves one party using threats or coercion to force the other party to enter into the contract. In this case, the threat of losing the job if the contract was not signed could be considered duress. Contracts signed under duress are typically not considered legally binding. It is advisable to seek legal advice to determine the validity of the contract in this situation. **

Written prayers can be valid if they are sincere and heartfelt expressions of one's faith and devotion. Many religious traditions have a long history of written prayers that are considered valid and meaningful. However, the sincerity and intention behind the written prayer are important factors in determining its validity. Ultimately, the validity of a written prayer depends on the individual's personal beliefs and the significance they attribute to the act of prayer. **

To determine if your ETA (Electronic Travel Authorization) is valid, you can check the status on the official website of the government of the country you are traveling to. You will need to enter your passport and personal information to verify the validity of your ETA. It's important to ensure that your ETA is valid before traveling to avoid any issues at the border or immigration control. If your ETA is not valid, you may need to reapply or obtain the necessary travel authorization before your trip. **

To determine if the stamp is valid, you should check the date of issue and any expiration date. Additionally, you should verify if the stamp meets the postal service's requirements for size, weight, and denomination. If the stamp meets all these criteria, then it is likely valid for use. However, it's always best to consult with the postal service or a postal clerk for confirmation. **

Without specific details about the advertisement in question, it is difficult to determine its validity. Validity of an advertisement can depend on various factors such as the accuracy of the information presented, compliance with advertising regulations, and the authenticity of the product or service being promoted. It is important to carefully evaluate the advertisement in question and consider these factors before determining its validity. **

To determine if something is legally valid, it would depend on the specific laws and regulations governing the issue at hand. It would be necessary to consult with a legal expert or attorney who is knowledgeable in the relevant area of law to determine the validity of the matter. Legal validity is determined by whether the action or document complies with the applicable laws and regulations. **